Quote
The set of b1 originals I have only go 375 at .650 and fall off from there.


If the heads aren’t “ported”........ the power numbers would make more sense.

And of course, then the question about how “correct” the manifold dimensions are comes into play.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads