Gt40 heads

Will GT40 heads work with a carbureted 302. Just wondering because all of the engines with GT40 heads are injected

The iron ones are bolt-on. GT40P's require special headers. The alum GT40-X's I *think* come in different combustion chamber sizes so you'd just need to be sure they won't up your compression too much, unless you want to run premium fuel anyway.

Originally Posted by Mazlem

The iron ones are bolt-on. GT40P's require special headers. The alum GT40-X's I *think* come in different combustion chamber sizes so you'd just need to be sure they won't up your compression too much, unless you want to run premium fuel anyway.

you are correct

Also, consider piston-to-valve clearances if simply doing a swap to the big valved options.

Originally Posted by 94_ranger

Will GT40 heads work with a carbureted 302. Just wondering because all of the engines with GT40 heads are injected

Yes they will swap fine.

If you have the GT40-p ones you'll need to verify spark plug clearance with your headers, Special headers are not required in every case.

another thing about the p heads is that you need to run a 98 explore spark plug.