i have a 95 f150 351w, i was thinking about put gt40 heads on it, what kinda improvements would it give me?

 

a 95 ford should have e7te's which should have 1.78/1.46 valves and 62-65CC chambers

gt40s i beleive have 60-63CC chambers with 1.84/1.54 valves. They flow much better then an e7 casting and will give u a little bump in compression. Depending on how much u r paying u can probably get a set of trickflow, rhs or edelbrock heads for pretty close to the same money and will show significant gains even over gt40 head especially with supporting mods such as a cam and nice roller rockers. a 351 can benifit alot from a healthy cam and a set of 2.02/1.6 heads. itll feel like a completely different engine

 

I personally think that heads without a better cam and exhaust
is not worth it. But then again it all adds up in the end $$$ wise.
Up to you.

 

i gotta set of gt-40'p' heads on my 351w with 1.70 rollar rockers and it does great

 

20hp by them selves, alittle more with a cam.

i agree with bleedblue, save some more money and buy a good set of aluminum heads and a cam you could pick up 50-75hp