Go with the comp xe268. With your compression, cubes, intake and exhaust that comp 268 is about the most amount of cam your combo will tolerate without a noticeable loss of bottom end power anyway. Actually with your combo I might even step down to the lunati voodoo 60302. It's got a little more lift than that comp but 4* @050 less duration than the comp268 and the 60302 is ground on a 112 lsa vs the comp's 110 lsa which the longer lsa may suit your stock 383 a little better anyway.