I did road racing from 1994 - 1999. First with my 94 Viper RT 10 and then in 1996 with my 96 Viper coupe. We have the Talladega Grand Prix Track within 60 miles of me, but have been to most tracks in the Southeast. More expensive than wrenching on these old cars. There is also Barber Motor Sports Park in Birmingham, AL. Its about 85 miles from me. On the Vipers, I just bolted on 4 slicks and went racing as Chrysler said you could do. I made some mods, air intake and exhaust, but not much else. Maintenance between track days, was 3-5 hundred not including tires. I never broke anything major, but did have a off the track experience in Savannah Ga. and ended up in the tire wall sideways, which set me back 3 grand.
I do have a 68 Dart GTS big block car that with another tire wheel combo does quite well at autocross tracks, but that doesn't happen much around here anymore. On it I added a 1 1/4 front sway bar, bigger torsion bars, and a rear sway bar. Lowered the car about 2" from stock and a firm feel PS box. The 451 stroker with a 6-pak give it enough power to hang the rearend anywhere you want it. It would do much better with a stick, but I didn't go there.