Hi
I am building my 350z VQ35DE engine for greddy tt td05h 18g kit. I am now buying forged internals: eagle H rods CP 8,5:1 pistons, new oem timing chain etc.. my goal is 500-550 whp. I have reseached the web but didnt found any stable answer...

1. Do I need the oil pump replace and what is the difference? (revup,nismo or cosworth).
2. Cranksahft, can hadle safe this power and does the bearing tolerances stay the same like factory?
3. tolerance for the pistons to cilinders?
4. Oem cams are good for fi?
5. Which comp: greddy emanage , haltech or turbo xs

Thanks guys