I know a ton of ppl that autocross here in cali, bout 50 ppl i think. Its so much fun autocrossing in a stang to, nice thing i love about are cars is its easy to throw the back end out.
If you throw out that back end be careful! Don't keep pushing until you know you have control over your car. There is a video on Kazaa that's titled how not to autocross your stang. Learn from that dude who messed up his stang by pushing it a little too hard. If you end up doing it good luck and post your times!
I usually do about 3 or 4 autoxs a year in my stang. I usually get my butt kicked because my mods put me in a class where most of the drivers are more expierenced then I am. But, it is still a blast. If I could give you one piece of advice....It would be to get as much expierence as you can BEFORE you start throwing mods at your car. In autoXing the smallest of mods can throw you in a class were you are going to be outgunned unless you are an expeirenced driver.
Yep, I autocross too. Like yellow2kgt said. If you want to be competitive, get a rule book first. I have a bone stock GT with a Cobra Daytona seat in it and they bumped me up to ESP where they kill me by 4 seconds.
you should get some full length sub frames ASAP if you are going to auto-X with a vert. it will help the car in the corners and prevent you from twisting the hell out of it.