You should start by reading through the rule book for autox. You will need to read about car classes and have to decided which one you want to be in and build your car towards that. I have run up there once and will probably be running there more in the fall once school starts up.
2003 Ford Focus ZX3("FUBARCUS" was "Brokus") - old and still busted
2007 Subaru Impreza 2.5i - current DD