juiceman I agree and I disagree.... You will never get a set of E7's to flow like a TFS,EDELBROCK, HOLLEY or AFR no matter how much porting is done. The 289 heads although will bump compression but the ports are small as hell, smaller then a E7. True their are guys deep in the 11's with stock componets, and I commend all of those people because that is a hell of a accomplishment.
Aluminum heads do loose more heat then a cast iron head but you can run more timing, and 50psi of the front of the car if it see's track duty is a lot, combined with the battery it's 100psi, thats a lot of weight off the right place. You are correct to the street guy it really probably won't matter. But a set of Aluminum heads will make you quicker as they will add 50-75HP with the proper combo.
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