So that is prolly around 394" (not doing the math... but should be close with a 4.0 stroke) Seems plenty stout... I have had so many people tell me that doing a 390 is garbage and you have to do a 408 or don't bother.. i don't see a issue with those dyno sheets if they aren't leaned on a bit :)
That's kinda what i planned to do with my 318, cept with trickflows.. wish i knew his specs..