I have car 1209 with a Roush 427r. I have done a ton of upgrades to the car since I got it 3 years ago. The top mechanical/functional would be 4 shocks, camber plates and 275lb front Hypercoil springs, Improved racing
oil thermostat, aluminum gas tank, remote reservoirs and upgrade the stock steering with beefier components. The top cosmetic upgrades would be, carbon fiber dash, autometer gauges with LED lighting and upgraded switches, replace incandescent idiot lights with LED's, radiator protector, pusher fans, hurst short shifter with ball and ceramic coating.
Fred