Body / Chassis
Aero Kits -> Aerodynamics
Weight Adjustment -> Ballast
Driving options are the defaults. This car won the A-spec World Classic Car Series without much trouble. (The std offline race, not an online one.)
Trans setup shows top speed as 149/135 but actual is about 130. Might make 5th gear a bit taller to get a few more MPH at top end.
Not sure how this setup would do against stiffer competition. Give it a try and let me know what you think.