Chad Spier is one of the greatest head porters in the buisness today a friend of mine also customer has used his Comp. Ported Profiler 210's with 2.10 1.60 with a Super Victor and a 950 Quickfuel-Annular Booster in a 383 with 11.25:1 compression with a custom Oregon Cam H-roller on a 108 lobe 1.65/1.5 stud rocker with 1 3/4 headers put out 570HP@6600 536tq @5100. Again it all depends on your goals and how much you wold like to spend.