All the Mopar classes too...
Classic (pre 74)
Modern (08 and up)
Could even break it down by Challenger, Charger, 300s, and Neons....SRTs or anything really.
Need an Oldsmobile (442s) class as well as Buick (GNs). Could add Pontiac in there as well and if you want to dig deeper get the sport compacts in there!
Heck, 370Zs, Cobalts, S2000s, etc etc.