I envisioned this setup as a "what-if" Ralliart car if they actually built one back in the 90's, similar to the Nismo 400R. You can use any GTO/3000GT Twin Turbo as a base for this car.
Engine is setup so as to maximise low end delivery while still improving engine performance. In regards to suspension, I've given it a more sportier feel. LSD settings is what truly makes a difference in this setup. It allows enough traction without disrupting the cars maneuverability much.
You can increase power if you feel it is not enough (torque is plenty); also for a bigger grin fit on some Sports Tyres.