340 Build help please.

Well 400hp at 6000 rpm (the numbers thrown around in this thread) would be about 350lb/ft.
Tq at peak hp is averagely 90% of peak tq so 350 tq should be 390 ish peak tq, 6000 rpm seems a little high to me and should be closer to 5700 rpm which would put peak tq over 400. There's no reason a decent built 340 can't get over 400 lbs/ft.