Gt40p head install

Gt40p head install. JEGS 28000 - Engine Assembly Lube [4 oz. 075" (3 shims) to get to the proper installed height of 1. 1 to rebuild the originals would have meant installing hardened valve sets and a complete rebuild. G. 030, Harland sharp 1. Read More » Starting a project to put GT40 cylinder heads on a 1975 351W! This video shows tear down and preparation for the new head! As far as I know the the true gt-40 head has 1. This is an older thread, you may not receive a response, and could be reviving an old thread. Find many great new & used options and get the best deals for 1 pair of Ford GT40P reman Cylinder Heads with 4 bar casting for 302 5. Joined January 27, 2002 Messages 10,648 Reaction score 13 GT40 heads ARE good to modify. Figure 3 Figure 4 Next I will overlay the GT40 head onto the 69 302 block, where I intend to install it. or questions. Ford Racing 1. PIA still. May 19, 2002 Here I am again needing help OK so here is my situation I recently picked up some freshly rebuilt GT40 (NOT GT40P) heads with a ARP head bolt kit and 2 new Fel Pro head gaskets for a cool 200$ I was hoping I can install them on my 289 engine. Join 5. 525" Lift, 131 Lbs Seat Pressure Fitment: GT40P 302 heads (for GT40 kits, check our other listings) Processing Time: Current processing time is around 30 days. 0 HO 1088 mustang lx and he's putting GT40p heads on it. That's the only way. 79. 0 with 302 bored . To make more When I bought those valves I was going to port a set of the D0OE heads and install them. And that the headers will These cylinder heads were a vast improvement over the E7TE cylinder heads that came on most Fox Body Mustangs. Yep, fox body specific. I will be Performance-wise, GT40P heads are a fantastic budget option for power gains. It will have the letters E7TE cast into the With a "Ribbed" ID, these fine seals are easy to install. I show Ford Performance's bolt tightening pat You may want to check with Hedman Hedders or Hooker for specific headers for the GT40P heads to fit your 66. I follow along from other guys and what they use. Jun 1, 2007 #4 Jun 1, 2007 #4 I have the "E" cam with my gt-40 P's , I believe the Stage 1 and E cam are similiar in specs . 92ponylx Discussion starter 93 posts · Joined 2010 Add to quote; Only show this user #1 · Aug 23, 2010. The head is disassembled, washed, and pressure tested. Hi all, I am thinking about going from my stock heads to used GT40P heads. S. I have the crane cams cobra 1. 0 OHV IRON 302 SBF GT40P V8 CYLINDER HEAD REBUILT . Add to quote; Only show this user stock Aluminum FMS GT40 heads (not X) 212. Just recently a noise coming from the valve cover was getting louder and louder so i pulled the cover today and one of the rockers is quite a bit more loose than the others (rocker will seperate from valve if rocked by hand) so i tried torqueing it down and even after getting the bolt tight the In 2 years of use I've had zero issues with burned wires. I only let it run a few minutes and there was coolant spitting out my exhaust. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Earlier this year I blew a head gasket on one side. Items You Need. You guys will find out in the long run. 558"-. Installing an Edlebrock Performer RPM lower intake manifold on the GT40 head swapped fox body mustang. Id run them over other stock 351 heads. 5" -Heads up 1/8th mile limited 8. The heads were milled a couple thousand but the block deck was stock. 0L 4 Bar Rebuilt Cylinder Head with Rockers 1996-2001. We noticed it would briefly smoke on startup and did use some oil. I got a set of AFR heads , night and day. Share this product . 0 HO? or do they have to be All in all these Ford Racing headers are very nice and of great quality. That might have been the end of the discussion if the Cobra were the only vehicle that the GT40 head came equipped on but several other Ford vehicles, including the ubiquitous Explorer and Mountaineer, were also equipped with Well this is turning out to be a major PITAS. Motor is originally from an Explorer. Ford GT40P 302 5. Remember the 351W has the exact same exhaust port as a 289 in shape, size and volume. I bet they have a similar kit for the GT40's Tim The last Gt40p build that I did I used a set from Alexs Parts. I bought a used set of FRRP foxbody headers for P heads and just installed the driver side, which led to an additional issue. Elite Explorer. 58cc gave me approx. But I ran across the care castings or $100 bucks and couldn't pass them up. 5 class at Kilkare Dragway Dedpedal Racing;Sponsered by Lasota Racing ;Tuned by S&M motorsports Boss block Big bore 347/225 TFS HP's/SR/BW S476R/A2W/PG/FAST xfi on E85 Not "P" heads, so you will need the "P" headers. Insert Quotes Post Reply Related Threads ? ? ? ? ? I installed the same RR's on GT-40 heads on a stock short block a few days ago and had miles of clearance. I didn't even let it I was wondering if anyone else has done this swap and if they ran into any snags. Also, the GT40P heads use the Not sure on what a rebuild cost these days but when I looked at getting my stock heads rebuilt the way I wanted ie larger SS valves, teflon seals, and screw in studs It was only about $200 more for aftermarket heads that would out flow anything I could have done to stock heads right out of the box. 0 heads which are the venerable GT40p’s. I also have heard the P heads use different headers. 10 rearend Oh and a Mallory Comp 9000 unilite distributer and Mallory HYFIRE DIGITAL 6 ignition and Mac 351 swap 1 3/4 SB FORD, GT40P, E7 DROP IN VALVE SPRING KIT, HYD ROLLER - Alex's Parts Sales c. I don't regret it now since I dont' think that the D0 heads have the HP potential of the "P" heads with their improved combustion chamber. 0L 4 BAR Cylinder Head Assembly's. 0 Mustang & Super Fords Magazine as they go through the steps of installing GT-40P heads onto a Mustang. Anybody have any GT40p advice? It is bored . crane roler rockers gold 1. 37 sold. Get the 1996 Explorer regular GT40 heads, not the 97-00 gt 40p heads. Should GT40 heads have the 3 bars on the front and GT40P heads have 4 bars. The ball flange is larger on the 94/95 so it gave me a large exhaust leak at the flange. 820 in. There is no need to get special spark. The E7 heads (now on truck) spark plugs are Add to quote; Only show this user The one issue with the GT40P head is the different plug angle making you pay attention to header selection. These headers are specifically designed to work with GT40P specific heads. HELP CENTER. Founding Member. 6 rockers. the cast and aluminum gt40's will be fine with stock type headers. I got great heads for about $500 including shop cost I believe 6. Probably the We are installing the CORRECT headers for the GT40P heads. The exhaust port on the P head is a high velocity design. Of course, what Well I only have limited pictures from before I installed the heads and a couple of them were ebay pictures that I can't seem to download right now. I no longer have the heads. Using it as weekend errand runner. 0L SBF at the best online prices at eBay! Free shipping for many products! I'm very impressed with the heads, will update after install with results, upgrading from stock heads on roller 351w to these. Springs, locks, keepers and valve seals were right at $100. Though the plain steel headers are slightly more than $250 but I think these might be what you're after. My concerns are for intake match and valve interference. This means it will ship in around 30+ days after Depends on current wear of pushrod ends, preferable to use new pushrods at installation, along with check for correct length. Sort by Oldest first Oldest first Newest first Most reactions. Motors pretty stock but adding gt40 intake on top I just want it to run good and fun. Edl heads are a good head with good hardware. S Spencer Discussion starter 180 posts · Joined 2012 Add to quote; Only show this user #14 · Hey all, coming here to see if someone has a similar setup. Installed Height, Set of 16 I would think the dual springs would be better, but they are 2 different sizes. There are hard ceramic plug ends that probably would have worked but I didn’t discover them until after I changed heads. They sprayed it and made 502 HP. Ford done a good job on the when they redone the heads and made changes to them. Get everything you need from performance cylinder heads, head gaskets, cylinder heads bolts, or head stud kits. Purchase everything you need for your high-performance upgrade with these cylinder head and top-end kit options. stang-geoff Member. What will i need to do to mount regular gt 40 heads on a 1965 289 motor, I will be installing a eldelbrock performer intake, cam, lifter and timing chain set as well? Lizer, are you sure those GT40 heads were ever factory drilled for the 351w sized head bolts? (1/2" for 351 and 7/16" for the 289/305/5. We're going to a new Flowtech cam, new beehive valve springs, and Scorpion pedestal mount roller rockers. GT40 Heads: AUTOLITE stock--765 (Heat Range - 5) [14mm, . Very happy with the combination . Summit sells a Hooker super comp header that fits in our pre 66 Fairlanes but did not specify if it can be used for GT40P Heads. The only real problem you'll run into doing this (if you use the Bassani headers)is you will have to install the plugs first, before you put Designed to upgrade factory Ford 289-351W cast iron cylinder heads. I know to install the gt40p heads I will have to machine the bolt holes to use the 351w 1/2" bolts. BadWally1 Discussion starter 43 posts · Joined 2023 Add to quote; Only show this user #1 · Mar 12, 2023. I was on a budget and apparently, the ceramic coating will begin to flake off soon after installation. Remanufactured. requiring adjustable guide plates to correct the rocker-to-valve stem alignment. 979. Add an avatar, upload photo attachments, and more!. Currently I have standard 1968 heads, high rise intake and holly 600 4b carb. J. Are GT40 or GT40P heads a bolt on for my '65 289 A-code motor? The plan is to use the original cast iron intake & Autolite carb. 0L Ford Mustang/Mercury Cougar Part # 1650S (will not fit GT40P head) Part # 1650S-2 (WILL fit GT40P A Funnelweb on a set of GT40P heads would have crap low speed power because of the Funnelweb and crappy top end because of the smallish heads. From 9:1 to 9. There is no need to get special spark plug boots when installing these headers. Big different from the stock 83 heads. My cam is a . plain and simple,use 302 parts,and you'll make 302 power . Well I was wondering if with GT40P heads the stock exhaust and intake manifold are still usable? I know people are going to say why would you do that blah blah blah. All this produced Rebuilding the heads from my mustang. 54 valves, compared to 1. I show Ford Performance's bolt tightening pat Has anyone had any experience with the 351w /GT40P heads setup? Im in the process of removing the original factory heads now. Am I able to use the ones from my donor with stock heads, or will it require different ones? GT40P-Heads, 3-link 3. Shopping Bag 0 item(s) in cart/ total: $0 view cart. If not, will these heads still work on this engine. just turn them in. Roller rockers (maybe). Used ARP head bolts from corral. All out racing efforts with an almost unlimited budget can get that kind of RPM out of those heads but anything less than that won't do it. 49 60ft. I takeoff the stock E7 heads and upgrade to GT40P heads and install a ISKY racing cam shaft and GT40P heads on a flat tappet engine. I went through probably 5-6 sets of wires before I changed heads. Dec 16, 2002 189 0 0 Alden, KS. ) valves flow better - Ferrea are the best IMO. Probally an honest 60 With the GT40 intake, you are sure to add increased performance to your stock intake on your Fox Body, and we hope this article gave you more insight into the different options you can get. ) Rocker Arms: 3/8” Stud Mounted assembly; Push Rods: Stock-length hardened push rods will work in Pay attention to the different steam-hole port locations used in the gasket between the blocks. The P head is the next evolution of the GT40 head. everyone i talk to gives me a different answer. I'm thinking about buyin a set of gt40p heads and I'm just wondering if it's a direct bolt up or what. Dan as far as I have read over the years the P heads unmilled add about a half a point in compression. This is my first time trying to do my own heads so don't be too harsh on the ugliness of my job. Also how do I remove all the old tubing I'm just starting my search for either the GT40 or GT40P heads and lower cost is more important to me than the extra performance of the P heads. This warranty does NOT cover the following Installation of incorrect parts. They offer a sizeable boost compared to stock 5. For GT40 heads you grind the egr bumps off and MAYBE get them milled. That said there are some better aftermarket options for heads also. But they were a definite improvement in HP and torque. Tags foxbody gt40p heads install heads pushrods gt40p heads install heads pushrods I have an opportunity to purchase some new GT40P heads for a 1966 289 that I am building. 46 exhaust, which makes me wonder why that box in Rickster's photo says 1. Apr 20, 2010 Other than that, the TF springs needed different shims to achieve the same install height, and overall the TF has more strength, and you can tell when installing them. 0 Explorer with ported GT40P heads milled . 9 intakes and 1. Thanks alot-Dan Im about to install a set up GT40p heads. 7 Crane/Cobra rocker arms, stock head gaskets and GT-40 heads. Just my 0. This page is going to talk solely about the engine itself. Shop Ford GT40 Cylinder Heads and get Free Shipping on orders over $149 at Speedway Motors, the Racing and Rodding Specialists. SKU: PH4032 Add your favourites to cart. This my be wrong though. 9. The GT40’s have 3, 1 1/2” tall lines, the GT40p’s have 4 and the non GT heads have FRRP didn't revise the 94/95 headers for GT40p heads. Regular MAC Mustang header will work, but Add to quote; Only show this user #1 · Jul 2, 2019. It only flow marginally better because of the slightly larger valvewhich you could easily install in a 289 head. I'm very impressed with the heads, will update after install with results, upgrading from stock heads on roller 351w to these I'm pretty sure the heads won't necessarily be the limiting factor as far as your cam selection goes, it'll be the valve springs and piston to valve clearance. Toolbox. They were a tight fit - I thought the drivers might hit the shock towers under accel, but he said they didn't (again, a mild driver engine). I saw them at a local Tuesday night car show - a guy there had a '68 with GT40P heads and these headers installed. May 19, 2008 Since the heads are bare my machine shop guy is gonna install the stuff for stud mount style rockers. Tom just swapping heads from E heads. It seems like Hooker and Headman fit. Disadvantages: Require pushrod guideplates and hardened pushrods to ensure valvetrain stability (not a problem if the heads are set up for them cam choices for stock gt40p head. Note: Stock 302 cam b. There is no need to get special spark plug boots when installing these headers. 542 lift I believe, and they weren't just a single spring like the stock GT-40P springs they had dampners as well. Details: Fits all SBF Valve w/ 11/32" stems; Fits OE guides measuring- . I'm building an engine right now and I picked up some GT40P heads. 1. I found a set in a local junkyard off a mid 90's Explorer for $35 each. P heads are not "smog legal",meaning they dont have the holes drilled thru them for the thermactor/air pump,and therefore do not have the giant zit on the roof the plugs are no more difficult to install than stock mustang plugs. RYC CUKR. I plan on installing a mild cam, have a 600cfm carb and motorsport headers for a gt40p head. R. Thread starter crimsonclint; Start date May 19, 2008; crimsonclint New Member. They’re suppose to have more efficient combustion chamber and exhaust port. :smartass: GT40P Header Installation | Installing GT40P Specific Ford Racing Shorty Headers. They may not even hold up to a 5. They work well for the stock motors but if you are planing on adding a cam then there are better choices for heads and the GT40's would not be my FYI, the latest issue of Car Craft, they took a junk yard GT40P motor installed a Lunati Voodo can and a little bowl work and made 374 HP. Springs are stock springs for 1989 351W with flat tappet cam. Part # : GT40P, F77E . Opens in a new window or tab. 1989 Mustang 5. I am in the process of finding GT40P Heads, but I'm not sure if I have flat top pistons with valve reliefs. Plus, can't go wrong with free shipping! Advantages: Easy bolt-on mod for stock E7 or GT40/GT40P heads, fit under stock valve cover, rocker arm channels ensure valvetrain stability. I'd also like to port match and clean up the runners and bowls and after seeing the valves, have a 3 angle valve job done. $450 for both. gt40p heads with upgraded spings, good up to 560 lift. You would have to place some clay on top of the piston, put the cam in, place the head on the block, put in the lifter, mount the rockers, pushrods and turn the motor over a few times. 540" Lift (ADD HARDENED VALVE SHIM KIT: No, ADD VITON VALVE SEALS: No) VSK7G49-M If I go back to the Stock Explorer cam, I'm running the springs I have now. I recently found a 1997 Mercury Mountaineer in my local junkyard with suspected GT40p Heads and of course, the GT40 Upper Lower Intake Manifolds. I believe that if you are on a budget, a good machine or head shop will keep the cost down and you can bolt them right back on. I have the power slot tranny and there was a drastic difference when I Also any ideas on push rods, will stock 302 or my 289 rods work. (new car) I believe the E cam has a . Alternative is the Performer manifold and 4160 Holley I'm currently running. 02 cents. Go. 46 on "stockies" and the P heads have the larger intake valves but keep the 1. Doug S. Plan for the car is: Paxton sn89 supercharger, F303 cam, roller rockers, 60Ib injectors, and a cupple other fuel system mod and then go smoke my bros corvette It's a GSS307 which is a low volume pump, search the net for a GSS340 with the install kit and put that one in. Xtreme 8. Stay away from them. Kit also includes valve spring shims. I now have several of those so what do I do now. Paid about $200 to have the heads tanked, a broken bolt removed, surfaced . 0L heads, but their flow potential falls slightly short of the original GT40 variant. Then got the crane upgrade spring kit, sent to the machine shop had a valve job and milled a little. 8/3. Sorry to bring back an old thread. 0L 302 V-8 with nitrous makes 500 horsepower. Buy It 1987 - 1996 F150 & Larger F-Series Trucks - GT40P heads on F150 - I know the GT40P heads will bolt onto a 93 F150 302, question is will the exhaust headers on the F150 bolt up to the head AND have adequate room at the exhaust manifold and head for removal of the spark plugs. Add hard seats under the exhaust, and run 1. There are 4 different types of GT40 head. Cobra Discussion starter 5750 posts · Joined 2001 Add to quote; Only show this user #1 · Nov 12, 2001. Unless there is a off the shelf header that solves all the problems I will probably do my own engine up and possibly look at AFR heads or similiar. The GT40’s have 3, 1 1/2” tall lines, the GT40p’s have 4 and the non GT heads have none. jpuckett The GT40p heads have a different spark plug location. Or $500 -$700 for a used but professionally rebuilt set pf P heads Looking at some flow charts on line of GT-40P it looks like the lift from below 0. My Garage. The protoplasm may be 72, but the spirit is 32! Lifetime Supporter. It is bored . 1986 got some weird heads. I assume that I will have to purchase and install the push rods and rocker arms. 73, 15" Team III, firewall mod, trunk mod, trailer hitch, drivers foot box mod, front tow rings. Good heads if you can get 'em really cheap. 600 cfm carb (Edy or Holley). 5955 • FAX 909. Just dont expect any real gains. I have a 1995 351w with roller cam and tappets, I want to put the gt40p heads on it with stock 351w valves and aftermarket roller rockers. Application: Hydraulic Roller, up to . In this video I install GT40 iron heads and explain the proper procedure for torque sequence and torque load. They just don't match up. They have a smaller chamber at 59 CC. Then I'll have a valve job done to them. 6 exhausts. Trick Flow® valve spring upgrade kits include everything that you need to install a high performance cam. GT40P heads rock and love them with my setup . 708 Reach, 5/8" Hex]** I used GT40P heads on my V8 Ranger. any feedback would be a the heads I'm looking at now are GT40 cylinder heads milled w/scorpion 1. Motors pretty stock but adding gt40 First off, you do not "torque" studs into the block. STEP 2: Remove, clean the intake manifold, engine block surface before installation of new gasket and heads. I tried So recently bought a set of gt40p heads to install on a foxbody 5. When installing GT40P heads, it's imperitive you replace the springs. Out of the box they come ready for paint. LOL . 0 with some basic bolt ons well ima be getting some gt40p heads and a upper lower what all with i need to install and what should i do to the heads b4 so i can maximize hoarse power and also what headgasket set will i need to redoo this GT40p heads. Mar 8, 2008 18 0 1 Valdosta, GA. 540 kit for GT40P heads. The GT series heads are easily identified by thin raised lines cast into end of the heads. i am wondering what headers would be the easiest to install. since they were only the common 2V type I couldn't see getting much out of that. My Mustang ran 10. Thread starter 90LX5spd; Start date Apr 20, 2010; 9. So - in summary, if you are looking to install a GT40P engine and keep the GT40P heads - the above Ford Racing headers will work! Another Update on my GT40 head rebuild project. 6 roller rockers,AFM N-41 cam,AED HO Holley 650DP and Purestreet ported and extrude honed Weiand stealth intake c4(need c4 part's) tranny and 4. We used the supplied seals. I have Autolite double platinums (765) but I hear those arent the right ones. You'll want to do some clean - up grinding in all of the ports, especially the exhausts, Mustang Barn had a good explanation and drawings. I installed the Rebuilt heads and installed the Roller Rockers. REWARDS. I emailed him asking for some pics, but haven't heard back yet. 0?I know the 86 5. My car has the California smog T/E system which is very restrictive (dyno showed 122 horse power). 25 compression. 5:1. 0 302 with 1979-1993 Mustang cylinder heads & accessories. GT40 heads are great budget heads but when you start porting them out to flow numbers similar to the big aftermarket production heads they get pricey. The attached picture shows "GT40P" under the valve cover. Perhaps you're getting too much fuel and running rich? If the A/F was around a friendly 13:1, I suspect you'd only need around 32 degrees total, and it'd feel stronger than it does now. Above that the exhaust flow starts to separate itself. After weighing all the costs to either rebuild my old heads on the mustang, aluminum after market or GT40 heads I decided to go with the GT40's for a couple reasons. Aug 13, 2005 53 0 0 PA. Don't use more then about 28* total timing on a P head either. I didn't think much of it now until reading about this potential issue. The following year,87 got the The GT-40 heads average a 30HP increase alone, over the stock HO heads. GT40p heads and Headers Thanks Stngfish67, the more I research this problem I am unfortunately coming up with the same conclusion. Arrow Highway, San Dimas, California 91773 * Phone 909. The block has been decked and has new flattop pistons for a CR of just under 9. Better quality, profiled ( back cut etc. roller cam which valvesprings should I use I am not Sanderson says that they have headers for GT40P heads, when I was debating on putting a set on my 351W I emailed Sanderson's and they said they did. 1995 Mustang GT Cnv 427 stroker, w/ 400 shot of NOS for fun 1996 Cobra with Kenne Bell 2. Take note of where the two steam holes would end up. Telling GT40 and GT40P heads apart is crucial for enthusiasts. Ford 302 5. (suggested) 5) Remove one of the spark plugs and check you can use two different types, freeze a tootsie roll or you can use hard clay placed on the piston, install your heads but dont fully torque them just snug so they dont move, install your valvetrain rotate the engine a full cycle for the cylinder tested, then disassemble your heads and valvetrain, and measure the thickness of the impression the valve made on the The GT40p heads have a different spark plug location. Also keep in mind that the GT40 heads are not the best heads available for the 351W engine. Mike '91 SSP Coupe (Cop motor, cop tires, cop suspension, cop shocks and runs on regular gas) Save Share Reply Quote Like. wide choice of aftermarket heads for them to install on. Remanufacturing Process Includes: - Complete disassembly and thorough cleaning via hot tank & pressure tested to confirm casting integrity - New valve seats installed as necessary - New valve stem seals installed on all our heads & all valve guides are replaced with new ones as necessary. I ordered a rebuild kit for the motor and it came with valve seals for the stock E7 heads. Greetings, seeking some advice from some Ford engine builders. yes my nose was whistling, just coming off a cold. '88 GT Pushrod Installation on GT40P Heads. The math on the GT40P heads just didnt work out. Valve Spring Kit GT40P, Low & Mid Lift Cams, High Output Drop in up to . 2304 posts Ford 302 Windsor Headers, V8 OEM & GT40P Heads, XR-XF Falcon, Fairlane, 02 Bungs, Blue Finish, 4 into 1, Tuned length, Extractors. They are brand new bare castings that have never been installed or assembled. The GT40 heads have thermactor holes built in to connect to the EGR/smog equipment whereas the GT40P heads use an external EGR connective system. There was plenty of piston to valve clearance. I show gasket installation, gasket maker I used, as w Installation Instructions Read all instructions carefully before attempting installation. I installed new head studs, Felpro 9333 PT1 gaskets, the stock pushrods and rockers. Just bought the car. Top end: Gt40p heads, port matched. SPEEDYLIFSAVR. The pictures show a 3 bar head. The 1996-97 models got the normal GT-40 heads while the 1998-2000 models got the revised versions, or the GT-40P. 400 lift at the valve. 90LX5spd New Member. Also view our other article explaining what GT40 head are!. 84 intake and 1. Ford stock length pushrods. Trick flow head The stock springs that come installed on GT40P heads (remember, GT40P's come from factory Explorers/Mountaineers, they cannot be bought new) are awful. 1 Supercharger dynoed at 12psi FORD EXPLORER MOUNTAINEER 5. Hello, Guest! Login. San Martin, CA. Click to expand It's definitely a 302 lower intake then, which will not fit on a 351. Speakig with the engineer incharge of the GT40 head design we discussed the usage of the DOOE intake port with the The gt40 series are def. 9cc exhaust between the iron and aluminum GT40s and and a whopping difference of +48cc intake and +32cc exhaust between GT40X and iron GT40s So my husband is rebuilding his 5. Please consider creating a new thread. We used the stock 5. Click to expand Yup, I typed it backwards. 55s, FMS springs, Megabite control GT40P heads. Is it simple swapout old valve spring for “alex” spring? 3) Will the Ford 7/16 head bolts for the 302 work with GT40P heads? 4) Will the 302 head gasket work for GT40P? 5) Should I use the GT40P push rods or stock 302 push Rods? a. Bronco Guru. I reved it up a few times and it sounded real healthy and powerfull. They are equipped with 1. Then you can design the valve train to match the application and cam. I was told (haven't been able to verify) that the GT40P heads won't work on an early 289 beacuse they are set up for a roller motor. 440 E. 1 of 2 Go to page. Joined Jun 30, 2010 I have a 1965 fairlane with a 5. Not even close. A good head to use on the 289, is the GT40P head. No GT40P head will make the same power as a TFS or AFR head. 6 blue pedestal rockers used from corral. i was told that hooker super comp would work. Status Not open for further replies. The one complaint I hear about Hooker in general is poor ground clearance. 300 is very similar on the SWP heads. For 1997, revised cylinder heads increased If you're not a header kind of guy, the repro 289 HIPO manifolds bolt up to the GT40P heads with plenty of spark plug room. Anyway I installed the gt40p heads using the specs out of my haynes book 3 steps, and the final torque spec was 70 ft/lb. I’m using them and I’m very pleased with them. Ford introduced the 5. I most times just end up laping the valves before installing. Now I'm lost again. I have a nice standard bore 1968 Ford 302 that I just acquired. 5~1 with 60 cc heads. That's fine that's what we have these forums for, to help each other out. 6 Roller rockers, TFS Stage 1 cam, MSD 6A, Holley 650 4150 carb, Edelbrock Performer RPM intake, FRPP Shorty "P" headers, Dr Gas X-pipe, Flowmasters, 8. Joined Sep 28, 2004 Messages 5,856 Loc. I went to install the first set of intake/exhaust springs from the TFS upgrade (TFS-2500100) and both sides need at least . 54-inch), high-flow ports, high-rate capacity fuel pump, and injectors, revised combustion chambers, a redesigned air filter for improved airflow and a true dual exhaust system. To tell the difference, take a look at the castings on the heads themselves. Flat tappet hyrdaulic cam - mild for low rpm torque. They fit nice onto the GT40P heads and appear to have the correct ball & socket flange angles to mate with the factory Bronco Y-pipe. 550 I got these heads for $150 shipped so I don't feel so attached that I don't want to experiment with them. Call 800. Talk to the experts. 6 valves to install Guy 1984 SVO – Faster than the Pace Car 1979 Indy 500 Pace Car - Ported GT40P heads, Crane 1. Max Output Beehive Valve Spring Kit for SB FORD GT40P. The GT40P heads are cheap, have a 60 CC chamber and have a very efficient chamber. However there are plenty of factory heads that with the help of an experienced machine shop can be great. Steve, 2020 Jeep Gladiator We are installing the CORRECT headers for the GT40P heads. Well everything went good and it fired right up and sounded great and ran great. 30 over with Comp 270H Cam with 500 Lift. 84-inch) and exhaust valves (1. 250" is with a totally stock block, stock Cobra cam, 1. Fits Factory Heads, Custom Built to Order w/ 30 day processing time. GT40 with 7/16 head bolt size (came on OE 302s) GT40p with 7/16 head bolt size (came on later OE 302s) GT40 with 1/2 head bolt size (came on Gen1 lightning and super rare Mustang Cobra Rs) Ford aftermarket GT40s with both size head bolts Only heads with a 1/2 head bolt hole will work on a 351w. Also if you look at the lower head bolt by the number 1 or 8 cylinder you would see GT for GT40 heads and GTP for GT40P heads cast into the head. The 351 uses a wider lower intake, though the upper intake is interchangeable. However, if trying to use Mustang 5. I just installed a set of GT40P heads on my 72. Change anything and it's time to measure. You won't have to worry about plugging thermactor ports at the rear of the heads either with the "P" heads I have a set of GT40P heads for sale. 800" on my GT40p heads. BC Broncos headers can work with P heads but burning plug wires will happen. but had previous versions of the GT40 aluminum heads and used a couple of different rocker arm combinations with them. You'll have If you are starting with a cylinder head core in good shape — a solid undamaged deck surface, tight valve guides, and relatively undamaged valve seats — a full refresh is an easy and economical process. I went ahead and took the chance that they may work and may not work. 78 - that's the stock E7TE intake size. A GT40 head will have 3 vertical bars on the front of the head with a “GT” cast into the head The stock springs that come installed on GT40P heads (remember, GT40P's come from factory Explorers/Mountaineers, they cannot be bought new) are awful. 84/1. Needed to have the shop drill out the headbolt holes and install brass freeze plugs, and they also replaced the valve stem guides. Tube] Are these gt40 heads or a mix of whatever you have at the time. They also have new cast iron valve guides installed and are machined down to accomodate cams up to . It's a new rebuilt shortblock 306 with my previous GT40P heads I had on my old engine. just wanted a few pointers on the install of gt40ps and the upper and lower intake right now i have a pretty much stock 302 e cam, cai, full exhuast bbk shorty headers, You can find GT40 or GT40p heads out there bare for a couple of hundred dollare if you look. *Comp 246HR cam installed into stock block and heads that made 40hp more than a stock 5. One thing that my crate engine's heads contained that I doubt were installed in the production Cobra Mustang's Ive got some GT40P heads that Ive been porting and am about ready for the machine work. Fully ported with the Trick Flow Spring kit, OE style flat top pistons with 1605 compression height and the XE264XR-14 cam with 512 lift and 1. have no use for the p heads, decided to go aluminum. The port work is pretty mild and more or less following along with Mouse's page. It flows 255lph at Trick Flow sells a spring upgrade kit for SBF heads, they are the same springs they use on the Twisted Wedge heads and I installed that kit on my old GT-40P heads. Outside Diameter, 1. Parts. also you might consider letting a pro mechanic install them for you . You fell and bumped your head. GT40P heads on old 302? Jump to Latest 2K views 4 replies 4 participants last post by BadWally1 Mar 17, 2023. 6 '69stangdude. $410. Sep 18, 2000 666 0 16 FL,89 LX 5. 0 block from thunder bird. odessa*cylinderhead (15,610) 95. 0L 4 Bar Cylinder Head Assembly Genuine OEM SET / Pair-This is a SET of Rebuilt Ford GT40P 5. You know, the bare flanges used for custom fabbed headers like these: FORD Patriot Exhaust H7842 Patriot Header GT40 Head Installation on 1990 Mustang GT. Why add the extra aggravation when you are gonna choke them off with a stock exhaust manifold, or spend a lot more money for headers. The Sanderson FF3GTS header set is designed to fit small block Ford 289-302 engines in 1964-68 Ford They are GT40P heads. 599. (Assuming this is where the gains happen with aftermarket/GT40P heads over the stock 70s heads we all have) I don't spend much time above 4k RPMs. When installing GT40P's, it's imperitive you replace the springs. While P heads are slighlty better the header issues are a down fall and I wouldnt bother running them on a 351 Cheap is good. The GT40P heads also had a different spark plug placement making header cylinder head. 0 OHV 302 SBF GT40P V8 CYLINDER HEADS NO CORE. So, we need to figure out how long of pushrods I need, how to get proper rocker arm geometry, and shim the rockers for the consistent/balanced lifter preload. Before pulling the heads with the blown head gasket, all cylinders were showing compression numbers around 135psi, except for the two where the gasket had gone. The reason is Re: need help i have a built 351w thats built to a 363 stroker wanting to put a set of good heads on it its punched . I don't know the numbers off the top of my head, but stock Explorer GT40 heads valve springs are only good to something like . Identifying GT40 and GT40P Heads. Corporate Office: PerTronix Inc. Jan 6, 2006 #1 Jan 6, 2006 #1 I just recieved my bbk headers from summit. It is a tight fit with the plugs as far as installation. I'm very impressed with the heads, will update after install with results, upgrading from stock heads on roller 351w to these. I'm very impressed with the heads, will update after install with results, upgrading from stock heads on roller 351w to these i have a set of gt40 p heads and am looking to put long tube headers on them. you will need special headers IF you go with the gt40 p's. I'm currently running an E303 cam, I have no idea what heads are in the car, but their cast iron and suck, so im not sure of the valve train and wouldnt be supprised if the springs dont match the cams lift. 0 headers in a Bronco, you will still need to modify your factory or aftermarket Y-pipe to mate to the Mustang header ball flanges properly. I'd use the 65 heads in a heartbeat. Jump to Latest 5K views 4 replies 3 participants last post by ebxr8240 Nov 12, 2001. The GT40 heads also often have “GT” cast into them on the outside by the outer plug holes and the GT40p’s often have GTP cast in the same location. STEP 3: Position the new cylinder head gasket over the The smaller valves found in GT-40P heads improve airflow velocity. JEGS 28030 - Blue RTV, Temperature Resistant up to 500 degrees [3 oz. Would someone recommend a set of spark plugs for me please? 904Bronco. Just reading threads I was thinking the gt40p heads would be a good upgrade but I see other heads cheaper but have no ideal if they would be good. A RPM or Air-Gap on a set of GT40P's would be an excellent fit for a 302 turning 6k rpm. Ford lifters. o. are you sure it is a 2000 model should be 96-98 The stock springs that come installed on GT40P heads (remember, GT40P's come from factory Explorers/Mountaineers, they cannot be bought new) are awful. Keep in mind in the Engine Masters Competition, in 2018, IIRC the winner was a Ford 390 with Iron gt40p's are ok heads, but can benefit alot from porting from what i understand. 0122, 7am-10pm CST, everyday. Deck for around 10:1 compression. The engineering number starts with "E6". roller cam which valvesprings should I use I am not In 2 years of use I've had zero issues with burned wires. The head has been rebuilt and is ready to be installed. I'm wondering what all these are for. Jump to Latest Follow 591 views 2 replies 2 participants last post by Killer95Stang Apr 12, 2004. 2 FORD EXPLORER MOUNTAINEER 5. 6 just to be safe. :livid: In the past, we’ve shared information about installing a 5. The GT-40 heads continued within the Ford Explorer despite the Mustangs receiving modular engines. There is no need to get special spark plug boots So recently bought a set of gt40p heads to install on a foxbody 5. samotrx7. The GT40 heads are more desirable over the GT40P heads for a reason. I got a pack of 8 blue ones, a pack of 8 black ones, and then a pack of 8 umbrella style ones in the kit. Learn. The GT40 heads were also available separately back then from the catalog. Hope these pictures help. The boat starts and runs but has noticeably less power. They also installed GT-40-type cast-iron cylinder heads, the tubular “tuned” manifold, tubular stainless-steel headers, larger intake (1. SBF headers can be made to fit GT40P heads by adding a header flange and using it like a spacer. C4 Tranny with B&M Shiftkit and Slap Shifter. so I am going to put gt40p heads on my stock shortblock with factory 87 h. Jump to Latest 7K views 23 replies 12 participants last post by beamer814 Aug 26, 2010. Did the 1970's Ford 302's have valve relief pistons. Would I still notice a Performance-wise, GT40P heads are a fantastic budget option for power gains. 564" OE replacement for E7, GT40 and GT40P castings This is a SET of Rebuilt Ford GT40P 5. I can get the heads and upper and lower for $400 and im buying the cam new Did you look at the sticky in this section about everything you need to know about GT40P heads, pretty much talk about the GT40 heads also. They are drilled fro 1/2" head bolts and drilled and tapped for screw in studs and guide plates (which have been installed). 40 0ver flat top pistons e303 cams highvolume oil pump 8 quart oil pan polished heads new valve springs and pushrods lifters ect. If you get the GT40 heads make sure they are the "P" version or cast iron and not the aluminum GT40 heads. I replaced the heads with gt40p head that I pulled from a junkyard explorer. While it’s still running well the short Ditch the GT40P heads. 55 gears, 4 Wheel Disk Power Brakes, 17" Halibrands, 4X4 Headers, Koni Shocks GRADUATION 90 Mazda RX7 with 2000 5. * Par. Performed compression test and #6 hole is A while back Iasked you what I needed to do to install a set of GT40P heads on a Mustang. The problem there is that puts the boot right next to the exhaust making it hard to get to and more likely to melt. 444 lift with the stock 1. Find many great new & used options and get the best deals for Gt40p Ford 302 5. I would say to replace them with the 1. 92 @ 123mph with a 1. C. Another vote for GT40 heads. Moderator Emeritus. Stock bolt down stamped steel rockers. I show gasket installation, gasket maker I used, as w GT40P heads on old 302? Jump to Latest 2K views 4 replies 4 participants last post by BadWally1 Mar 17, 2023. 6 pedastal mount with shims. There won't be enough shims in the kit to get all the springs set right. I want to get rid of the T/E system but keep everything in case I want to go back at one day. Start making serious horsepower in your 5. The P heads are 1 step better than the E7 heads In this video I upgrade my budget build small block Ford 302. For 1997, revised cylinder heads increased Part Number: GT40P / F77E. TRACK ORDER. 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - GT40p Heads for Carbed 302? - *Will the stock manifold(s) for ford carburation work with the GT40p heads?* I have recently acquired an '82 F100 with 302/5. Stock manifold may work with 90* boot, installing the plug first and maybe a little grinding. and forged crank im trying to get more power out of it and was told from the guy that built the engine if i went aluminum heads GT40P head installation question. I bought Allen head cap bolts so I could use the rounded allen wrenches. See more info in the head flow section further below. Gt40 same as early 351 heads not great heads by any means better than stock 302/later 351 heads. We show you how to upgrade your Ford GT40P heads with help from Comp Cams, Lunati, Trick Flow Specialties and more. Upgraded Lunati camshaft and GT40 cylinder heads on Ford Explorer Mustang 5. Select Afterpay at checkout. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright This is a SET of Rebuilt Ford GT40P 5. I'm just not sure what size I need, also according to the machine shop since I Now install the roller rocker onto the head and begin to hand-tighten the bolt. 495 Can anyone tell me the spark plugs I should use for gt40p heads, MSD, and Vortech supercharger w/ 12# boost. They were good to . You still need to have the heads worked at a machine shop and possibly add the cost of screw in studs and guideplates The stock springs that come installed on GT40P heads (remember, GT40P's come from factory Explorers/Mountaineers, they cannot be bought new) are aweful. And where would be a good place to get a set pretty We installed the TFS spring kit on some ported E7's we put on a friends car. I have a 66 coupe with a 289. Jun 29, 2017 #2 What ignition system are you running? Points, Duraspark, other? OP . The other casting I justed installed the TFS1 with my gt40p and stock rockers runs great. Home; eBay Store; New valve stem seals installed on all our heads & all valve guides are replaced with new ones as Add to quote; Only show this user #1 · Mar 23, 2004. They were new castings, not installed on an engine. As far as I know all GT40 heads used the air pump and only the GT40P did not because it runs so much cleaner then the GT40 and made more power. 0L V8 as an option for the Explorer in 1996. better than e7's, but honestly are not worth the $500 or $600 it takes to purchase and install them. 30 over, with 270 Comp Cam with 500 lift, Edelbrock RPM Intake, and Edelbrock 600 Carb. The ad says "GT40P heads and GT40 Explorer intake". It was only available in the 2wd models that first year, and had 210 hp and 280 ft-lb of torque. The kits contain valve springs with dampers, chromoly retainers, valve seals, locks, spring shims, and a spring height gauge I have new, bare, heads and 1. Shop. We replaced the stock cam with used trickflow stage 1 cam he got from corral, installed dot to dot. Explorer (1996-2001). The stock exhaust manifold will work just fine with a little minor grinding on the flange. I have been informed that the pedestal mount threads are slightly offset to the valve, one way or another. 6 pedestal roller rocker. DEALS. I got a set of GT40P heads for next to nothing. 6424 19641/2 to 73 260/289/302/5. aurdraco. He's a pro head porter. If you still have a lot of body work or whatever, to do before you install and fire that engine, don't assemble it until you are within a few weeks of anticipated firing. Personaly I wouldn't waste my time with GT40p heads. 472 posts · Joined 2008 Add to quote; Only show this user #12 · Sep 14, 2009. I used GT40P heads on my V8 Ranger. I show Ford Performance's bolt tightening pat In this video I upgrade my budget build small block Ford 302. Can I use the rocker arms and pedestals from a 5. Another Update on my GT40 head rebuild project. Here is my question. red95gtconvert New Member. Install spark plugs that are 2 heat ranges than stock and run them for approximately 200-300 miles. 075" (3 shims) to get to the proper installed height of Right now, I have a real GT40 intake with GT40P heads with a stock cam, BBK long tube headers, 70mm TB, and 75mm mass air meter. Fixing them primarily to sell. Thanks  Asked by: BamBam. This means it will ship in around 30+ days after 302, GT40P Heads, E cam, 4 into 4, Holley 600, Mallory Unilite, Levy SD T5, 3. Buy It Now. 02 and everything installed. No studs - bolt down - so no adjustment other than pushrod length. BBK headers do work with gt40p heads!!!! Thread starter orangecapri; Start date Jan 6, 2006; orangecapri New Member. i'm putting close to the How do '65 289 heads compare with GT40P heads? I'm about to install the screw in studs on an old set of '65 heads. Ok I have the GT40p heads, intake, and cam added to my set up. 512 max lift and I'm running the . Locks The GT40P heads are the ones that have spark plugs pointing straight out instead of angled. Well I got some gt40p heads from salvage yard. OP. Oct 14, 2012 stroker motor is adding 10-15% more cubic inches. Don 92 Mark VII LSC SE - soon OBDII and 4R70, GTC kit and 347, custom paint. 1987 Notchback - N/A stock 302, TFS heads, Holley Systemax, FTI cam, Astro A5 Best so far: 10. 46 exhaust valve . Jim Valako did a pretty nice job with the casting I gave him. But I just need to know, lol so your help is appreciated. 50 stainless steel valves and Comp Cams springs. We ditched the heads for some AL heads later on and the problem stopped. I had a set of ’69 302 heads I ran for a while . The GT40P use 1. 1943 posts · Joined 2009 Add to quote; Only show This is also 16% more than the highest flowing stock 5. 708 Reach, 5/8" Hex] GT 40, or Gt40P, are the plugs the same? I just installed gt-40's, need some plugs. Stock 302, GT40P(unported), Crane Powermax 2040, Crane 44308-1 springs, Cobra Intake, BBK 1 5/8" LT, 70 mm TB, pulleys, black magic fan, MSD 90 degree spark plug wires, MSD coil, walbro 255 LPH fuel pump, Kirban Adjustable FPR, svo 1. . 0L V8 Mustang's stock HO cam, rated at 0. james t. 78/1. Save Share Reply Quote Like. Figure 3 Is the 69 Block with the 68 head and Figure 4 is the 96 block with GT40 head. Jan 2, 2010 69 1 6. But if the performance potential is comparable I may, at some point in the future, drop them on the 5. What is the best head(s) for a budget minded top end upgrade from stock. Next Last. 5 CC 134. The installation and noise isn't worth it for a mild rpm engine. 708 Reach, 5/8" Hex] 1 step colder--764 (4) or 104 (4) [14mm, . I takeoff the stock E7 heads and upgrade to GT40P heads and install a ISKY racing cam shaft and The stock springs that come installed on GT40P heads (remember, GT40P's come from factory Explorers/Mountaineers, they cannot be You will have a good chance of valve contact with the pistons if using the GT40 or GT40P heads. '92 5. As is, you'll loose about a 1/2 point in CR with the P head unless you mill it. Finding Gt40p heads at the junkyard is getting more and more complicated and if you want to upgrade the heads you 0. Studs should only be installed snug into the block and use teflon sealant on the lower ones that extend into the water jacket. Save Share Like. 550 in (LMR always recommends to double check PTV when installing a new set of heads or cam regardless. Cobra GT-40 Part Numbers: 1993 Cobra – F3ZZ The stock springs that come installed on GT40P heads (remember, GT40P's come from factory Explorers/Mountaineers, they cannot be bought new) are awful. My goal was to open up the exhaust port and do basic bowl work on GT40 & GT40P heads are a common upgrade for the factory 302 found in the early Bronco. 00. 0 5 speed Add to Wish List. 0. GT40, GT40P, would be great factory heads. 0L 2bbl and auto trans. Tighten with one hand while twisting the pushrod with the other hand. 0) If not, and someone did not have Another 325 for a complete valve job, and I would say that is a pretty good bang for the buck. 0L V8 from a 1996-2001 Ford Explorer in to your Ford Ranger. 7 rockers. While you can use a stard small block header you will have intferance problems to work out. He had no air, power steering, power brakes, etc. On the MAC headers the #5 tube slips in separately after the main portion of the header is in. i would save up some more money and get a little better intake with that. 1 CC stock aluminum FMS GT40X heads 243 CC 172 CC this shows a difference of + 17. 5%. Our customers deserve the best in the industry and these are the finest bar none! Yes, fully compatible with all our drop in valve spring kits for SB Fords. You said I wood need a GT40 intake that had a casting # ending in BA. Take a look at this: I am getting some GT40 heads together for a 302 and I want to have 7/16" studs installed for stud mount roller rockers. Free shipping. May 29, 2006 382 0 0 ok so i have a 90 stok 5. They Note : Cylinder Head uses 7/16 Head Bolts . Neal 68 XR7 & 68 M-100. Luckily, they have distinct markings which valve springs for gt40p heads. The only real problem you'll run into doing this (if you use the Bassani headers)is you will have to install the plugs first, before you put The P heads flow better then the old 351W head. Weiand Stealth with 1/2" spacer. Just a quick question I was asked today which I didn't know the answer to, is the GT40P heads Australian or US sourced? The heads come with the springs and valves installed. Contributor. 56 with Well I only have limited pictures from before I installed the heads and a couple of them were ebay pictures that I can't seem to download right now. 1987 - 1996 F150 & Larger F-Series Trucks - GT40P Headers 93 F150 - Anyone know of a brand and part number for headers for a 93 F150 302 with GT40P heads? Tried a search, couldnt find anything. I know the spark plug angle is an issue with headers. Ford GT40 Cylinder Heads in-stock with same-day shipping. I was curious if there were any P head users that were able to use the FRPP shorties with spark plug boot mods or to know that it can't be done. 72 GT40 Heads: AUTOLITE stock--765 (Heat Range - 5) [14mm, . But the point is right. These headers are specifically designed to work with GT40P specific heads. Shorty header install making tick noise Jose36500 Stock bottom end GT40P heads. It was just a good deal on a new 302 with the GT40p heads that I I am in the process of finding GT40P Heads, but I'm not sure if I have flat top pistons with valve reliefs. We are installing the CORRECT headers for the GT40P heads. I'm changing the ones that were on the heads as In the past, we’ve shared information about installing a 5. 5cc Intake and -5. 0 heads (and any aftermarket head EXCEPT GT40P's). True - any Mustang aftermarket shorty header for a 5. IDENTIFICATION The GT series heads are easily identified by thin raised lines cast into end of the heads. E7 heads can only be positively identified by removing the head and flipping it over. sgmtino Discussion starter 350 posts · Joined 2003 Add to quote; Only show this user #1 · Nov 19, 2011. Of course I have a pair on my 83 mustang. Note : Cylinder Head uses 7/16 Head Bolts. I slipped the header in, held it up with some wire, install #7&8 plugs then lowered and bolted the header in. GIFT CARDS. Save for a good set of heads if you can. The guys here on the forum running them on 289's love them! Yes you need specific headers, such as MAC longtubes, but it'll work. Bottom end is stock to my knowledge. 0l Rebuilt Cylinder Head OEM 4 Line With Rocker Arms Explorer at the best online prices at eBay! Free shipping for many products! (1996-2001). Log into or create your Afterpay account, with instant approval decision. Thread starter stang-geoff; Start date Oct 9, 2010; 1; 2; Next. You didn’t provide a lot of I was wondering if anyone on here has done this swap?I have a pair of gt40p heads that were given to me by a good friend,and was wondering if it's a simple bolt on install for my 1986 5. 0 WILL bolt onto standard production 5. Should provide a good bump in compression, better flow due to larger valve size as well as real valve seats that are replaceable/cuttable unlike the stock set. They are popular because while they are relatively inexpensive they also offer a measurable increase in power to your engine. Some port work would get the combo to make power up to around 6500 or so. gunslingerboyd New Member. Of course Gt40p heads install. The 60 Another option are the GT40P heads. Good deal maybe its up to you in the end. will these heads work?I realize I will need the correct headers and plugwires as well,but any input Installing an Edlebrock Performer RPM lower intake manifold on the GT40 head swapped fox body mustang. Bottle] $4. There was plenty of piston to Iron heads with quick burn chambers shouldn't need 38 degrees that's more typical of older-style heads. My question is, does anyone know for certain which headers will work with GT40p heads, t5 conversion Hey, everyone. clean and ready to install. 0 has different pistons with no reliefs in them like the 87 and up. Oct 9, 2010 #1 Oct 9, 2010 #1 I just bought a set of gt40p heads today for my 86 mustang at a bargain! I'm wondering what cams are a good choice for the gt40p? GT40p heads with stock HO cam. 0 EFI mated to a T5 and just installed GT40P Heads on and am now in the process of finding a exhaust manifold/header to finish the job. GT40 heads info from a retired Ford Design Engineer. 94/1. I've got the GT40 heads and they don't flow quite as well as the GT40Ps even though the GT40s have a larger exhaust valve. Plenty of information there. 0 but I want to know what do I need to do or replace before installing. 500 in. Jump to Latest 11K views 5 replies 5 participants last post by 8950HO Nov 20, 2011. pia japh qmlbbo kpqx ylp ape jhispz rdh tnek frum