Just going off memory, but I believe I did mine up fairly standard and it works well. Full upgrades except I think I only did stage 2 weight reduction and turbo. It has exactly 350hp, so if you end up close to that then you did it right.
Tires: Comfort Hard
LSD: Initial 20 / Accel 60 / Decel 40
Ride height: -7 / -7 (I think I started out -10 but it was too low, can't remember where I ended up but I think it was -7 or -5)
Springs: 8.0 / 6.4
Front Dampers: Extension 8 / Compression 8
Rear Dampers: Extension 7 / Compression 6
Stabilizers: 2 / 3
Camber: 1.5 / 0
Toe: 0.00 / 0.00