GSR Head, B20 block, Cams + 100 shot will put you around the 250-275whp range. Most likely a stage 2 clutch. Exedy, XTD, ACT, Competition are all good. Stay away from F1 Racing, Gripforce, etc. Fidanza or ACT Flywheel, OEM throw out bearing. If you're spending all this money, and dropping the transmission, you may as well go ahead and find a GSR or B16 LSD Transmission. Will help your track times alot.