Here's my grey matter 3.2 prediction.....
On a "typical" 493/505/520 bracket or hot street type build, with normal compression ratios(10.0-13.5) and cam lift/duration(.550-.700 lift, 250-280 @.050) running a single plane manifold with a properly sized carb, and the proper sized headers for the application, the TQ peaks would be within 500rpm of each other if you changed ONLY the heads and intake manifold.
Dwayne ,
what potential HP gain would think ? If say swapping out only the heads . Or would you maybe need to pick up some lift , 1.6 rocker change ?
thanks
Tex
