FWIW, a couple of "learned" engine builders on your side of the Pacific discussed this on another site a while back -

They both ended up agreeing that a rule of thumb would be to add appx 8 degrees @ .50 when selcting a 408 camshaft over a 360.

Not sure how they arrived at that figure - experience probably

- but it seems to concur with whats been said here.....

Last edited by Moparmal; 09/27/11 06:41 AM.