No ****. People barely break 350whp with a decent cam, genV and a nice intercooler on a high compression block. Every horse after that is $$$$.
A car that I tuned and helped build made 373whp and 398wtq on e85 with:

XP cam + springs
Ported Gen3 on 2.6 pulley + N*
Old design Wbodystore intercooler, ZZP front mount, and a $20 Walmart bilge pump for fishtanks
SSM90 LIM
STOCK L36 block
STOCK timing chain
STOCK L36 heads
STOCK 4t65e non-HD transmission

Everything was bought used and he didnt spend much money on the car at all. He gets valve float and was running out of fuel pump so his dyno dropped off. Id bet money that we will hit 400whp on a stock L36 block with stock L36 heads once we get the few kinks worked out. That being said, he needs a built transmission before he can get good track times.