[Chevy454]

Jim:

You are right on about the size of the ports, and the fact that the manifolds kill them! When I participated in the "Certified Stock" tear down this past week, I was the only Chevy car there on Wednesday, and I heard several people comment on how Chevrolet had "other intentions" when designing their hi-po BBC heads/ports. There was a 440-6, a 455 Stage 1, and Hemi also certifying that day, and they all commented on the seriousness (sp?) of the Chevy heads straight from the factory. BUT, the great equalizer is the crummy exhaust manifolds. That is one area the Hemi cars are definitely ahead of the game.