302 head question
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New User
Joined: Jan 2009
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From: newton
302 head question
hello everyone. Im starting on my 1971 302 engine im going to be putting into my 1959 f100. First off i was going to put in the gt40p heads. but then i heard that the gt40 with out the p are better... so i dont know which to go with. or wat heads would be best... also i was wondering wat else i would have to change with doing that. plus any words of wisdom please.
thank u all!
thank u all!
Posting Guru
Joined: Jan 2005
Posts: 1,299
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From: The Vieux Ford, Kansas
The Ps flow better but the plug angle makes it to where some shorty headers won't fit. I don't think the difference in flow was all that much though either one would be a decent head. I am not a windsor guy so other will know more than me.
-Johnboy
-Johnboy
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New User
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From: newton
thanks!
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Yes the P heads make life a little more difficult, but the big problem with plug clearance is with equal length shorty headers, with longtubes or regular shorties it's not nearly as bad. One guy here even posted pics of his truck with GT40P's and longtubes, he said all he had to do was clearance the header slightly around 1 or 2 plugs and use wires with 90 deg boots. The P heads will provide more compression and flow better than the regular GT40 so there are some benefits to working out the header fitment.
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Joined: Jun 2004
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From: Winchester
I have p heads on my Mustang.Here is link I found with some info on them.
http://web.archive.org/web/200212030...ang/gt40p.html
http://web.archive.org/web/200212030...ang/gt40p.html
