why dont you just supercharge or turbo your y8. I have a supercharged 200 whp y8 with the stock internals and 100,000+ miles and I have been driving this setup for about 2 years without one single problem. And have done everything fairly inexpensively.
96 civic ex
jrsc @ 10 psi
hondata s200 w/ boost option
550 injectors
CAI and Headers
port and polished head
heat wrap
2.25 exhaust w/ test pipe(no cat)