The Solo rulebook has everything you'll ever need to know. Just remember, if it doesn't
explicitly allow it, it's not allowed:
http://scca.com/documents/Solo_Rules...Solo_Rules.pdf
If the car came from factory with a non-ABS option, I as far as I know even stock class could get away with the ABS delete. However, I'm under the impression that all 2G AWDs came with ABS standard, so you may want to look into that, as I believe trim level plays into it. If you want a definite answer, post a thread in the rules section on the MAC forums. Someone there'll know for sure.