[Goat4three]

currently i have a 67 gto with 3.55 gears and a turbo 400. i checked the engine code and i have a '73 400 with 4X heads. i want to go mid 12's in the quarter and keep the pistons, crank, and rods stock (as this is what i believe they currently are). i just pulled the motor today and i am about to disassemble the top end. i was thinking about using the edelbrock performer rpm "total performance package" with the heads, intake, carb, cam, and headers by doug but there are a few specs i'm not too sure about.

one being, what is the difference between the the two available heads, i know the difference in the combustion chamber size but which size do i want. the edelbrock catalogue claims some 422 h.p. using a "stock" 400 with the 72cc heads but will i have gas issues (i want to run pump gas)?
will the 87cc heads perform like i want (i know either will be a vast improvement over the 114cc 4X's i currently have, but for $2,000 dollars i want the best for my application.)


the second question is with the cam. the numbers on the cam seem to be consistant with the ram air IV cam which i thought would be a good choice but after searching some of the threads on this forum i'm beginning to think otherwise.

i have noticed on alot of the shoot outs in H.P.P. that not alot of people use the edelbrock cam. most use crower or lunati or comp. i assume there is a great reason for this but i'm not too knowledgable about cam #'s and related stuff.

spending money is one thing...but wasting it on components that don't work together is another.