Overall fantastic car.
Handling: 5/5 - having raced in the NASCAR Pinty's Series, the turn-in feel on bias-ply tires was really well done.
Engine: 3/5 - The torque curve looks like the user got values in lbs-ft and inputted where it should be Nm. Once that was revised, power curve felt much more realistic - previously it was far too easy to be flat-out mid-corner which is impossible in the real car. Redline was also at 6000 RPM when it should be at 7400. Once that was corrected along with engine damage values, the car felt fantastic.
Transmission: 4/5 - changed the values for shifting allowance, increasing it to +/- 1000 rpm to make it more like a proper dog-box. The actual gearbox you can put it in any gear from any other gear - some are just more expensive than others!
All the basics are there for a really, really accurate model. Really impressed. Just needed some tweaking on the drivetrain side to make it perfect.