As he stated above just leave the car stock. I believe a person new to autocrossing will learn faster in a stock car than in a modified car. A modified car can hide bad driving techniques AND bite you in the butt if you have some extreme mods.
__________________
Sponsored by: KAM Racing Sports, Falken Tires, Progress Technology, Brady's High Performance, Taggart Performance Engineering, Rotora Brakes
Autocross is: 90% driver, 5% car, & 5%
CRAZY MOJO!
Autocross Help Page