Read this thread.
http://www.classicseacraft.com/commu...951#post232951
I spoke w him about it and I think he said it chine walked a bit with the 383 but I don't know how it was set up.
FWIW I will likely be replacing my 5.7 with a 6.0. I already replaced my Alpha with a Bravo 1X so it can handle the torque and the 6.0 is a Gen IV SB motor with the better efficiency.
The Gen V motors came out recently - no 6.0 (although it is still in production as Gen IV), but they added a really nice aluminum 6.2 (L86) using the VVT, direct injection, and 12 more CI for big $$.
At the rate I'm going, Gen VI might be out in time...