427 hp @ what 50 pounds boost? on first day sounds like bull**** to me."kaboom" Ya i had my apex on the dyno yesterday made 430hp first run!! cant wait until tomorrow were going for 600 hp.. If its true good for you,if it stays together for a half season, better yet. Pack chains, belts and drive shafts.
I apree, With this kind of numbers and light weight maybe this engine should be in a Kenworth.