"The 68-69 383HP road runner/superbee engine and the 375HP 440 Magnum used the exact same cam."
But, the stocker cam used in the 440, can't be used in the 69 383 because it hits the piston in the allowable blue print specs. So the cam has to be less duration, IF they let us notch the piston we could use the better 440 cam.
How can the 440 cam be different if it's a same cam in both engines from the factory ???
Yes I know that duration is not a checked spec and the deeper in the hole piston of the 69 440 allows more duration with the same lift.
I've said it before , and I'm sure I might have borrowed it from someone ... there is little that is STOCK in NHRA STOCK
