J's_Cobra

I got a set of cast GT40 heads for my roller 302 build and has some machine work done that took the valves out to a 1.94 intake and a 1.600 ex. i also have 1.6 roller rockers for them. are these the right heads for me in a street car? i hear a lot of people talking about how they like and dislike the cast heads. but im working on a budget. Any ideas?

mjr46

they are okay heads in your case with the larger than stock valves

J's_Cobra

So with the larger valves will make them a good performing street head? im going to have them ported as well. will that gain me enough performance to make it worth the money?

mjr46

depends on what your total investment is or will be in the heads, IMO if it's more than 500.00 bucks I'd rather put the money towards aluminum heads

J's_Cobra

I got them from a guy for 100 bucks and i spent 75 on the valve work. so i wont be over 500. i kinda want to stay with cast heads to make it kinda a sleeper when i pop the hood.

mjr46

well cam choice and intake will be your key to sleeper performance

J's_Cobra

it is a carb car with a eld 750 with a performer intake. the cam is a 5.55/5.65 lift cam.

mjr46

you mean .555/.565......sounds like the comp xe274 cam?? ditch the performer intake and at least get an rpm air gap

J's_Cobra

sorry its the lunati 510 A8. its .565/.565. and i have the performer intake because i have clearance problems under the hood and i read that the air gap was toller. i have 150 shot of NOS. should i have an open bore intake?

mjr46

just the performer intake is from idle to 5500 a better flowing intake would benifit your combo, i have an air gap intake and 1/2 no2 plate and it all fits under the hood with a dual snorkal air cleaner