OK so i picked some gt40 heads without realizing they had 1/2 head bolt holes was told i could use some kind of reducer to bolt them on my 302 they also seem to have aftermarket springs now my questions is can i use my stock pushrod/cam? going to be using stock pedestal rockers until i get the budget to get pedestal mounted roller rockers also if there a way to id springs?
Fox Gt40 Questions
- Thread starter 72gs455
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Yes, you need the bushings that step the head home down to 7/16. Here is a set of head studs with the bushings.
https://lmr.com/item/ARP-1544005/1979-95-Mustang-50L-Arp-High-Performance-Hex-Head-Stud-Kit
https://lmr.com/item/ARP-1544005/1979-95-Mustang-50L-Arp-High-Performance-Hex-Head-Stud-Kit
Are these GT40 heads or GT40P heads?
I've never used the reducers. That being said, it's the proper way to do it. Back when I started this, they either didn't make them, or no one had ever heard of them. I have always bolted heads right on with the standard ARP 7/16" stud or bolt kit and never had a problem.
Stock cam will work. It will make better power with a different cam. It's all a matter of how much time you want to spend vs cost/reward. Cams are cheap, but it's double the work to change the cam.
Stock rockers will work, but most people elect to go with rollers as it's not a huge cost or time consumer. Pushrods should be ok, but I would never send an engine without doing a pushrod geometry.
Based on what you are saying, I would save up the money for the rockers and possibly a cam before you do the swap. The incidental costs (like holy
have you seen what a gallon of antifreeze goes for these days) of tearing down the engine twice exceeds the value of those parts.Kurt
sorry works crazy so couldnt reply they are gt40s 3 barsAre these GT40 heads or GT40P heads?
I've never used the reducers. That being said, it's the proper way to do it. Back when I started this, they either didn't make them, or no one had ever heard of them. I have always bolted heads right on with the standard ARP 7/16" stud or bolt kit and never had a problem.
Stock cam will work. It will make better power with a different cam. It's all a matter of how much time you want to spend vs cost/reward. Cams are cheap, but it's double the work to change the cam.
Stock rockers will work, but most people elect to go with rollers as it's not a huge cost or time consumer. Pushrods should be ok, but I would never send an engine without doing a pushrod geometry.
Based on what you are saying, I would save up the money for the rockers and possibly a cam before you do the swap. The incidental costs (like holy
Kurt
Don't worry, I don't go on this website for days at a time either. My buddy has a matching Cobra cam around here somewhere. Better than a GT cam anyway. We also have a set of GT40 Cobra heads here somewhere too. I think the cam is in the scrap steel barrel, that's how much I would recommend it over paying for a proper cam. But if you are nearby, you are welcome to it.
Kurt
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