I have a early 60's 383 and a 77 400. One of them is going to be a stroker. I am not trying to turn this into a 400/451/??? combo post. I just want to know what advantages there might be in using the 383 rather than 400. Advantages for 400 are stronger block and cheaper and plentifull pistons for a bunch of combo's. Also MAYBE the bigger bore is an advantage. But maybe not on the bore. Some talk about the smaller bore having better "full combustion...flame travel fuller and faster...". What advantages exist in the 383 stroker. The 4.15 is a little long I think but how about any advantage in 3.90 or stock 440 crank over the same in a 400?