There has been another silver SVT at the event the last couple years with aftermarket wheels and a rear spoiler. He runs really well too, we have run together and it is a lot of fun. I think my father and I were the only father son combination there, so it must have been us your friend talked to.
The last time I checked the web site there was one spot left for the novice group. Check this link
http://www.smcrinc.org/glen_event_frame.htm for futher info. but also click on the "Garage Bay and Run Group Status" to check for open spots.
I would love to see a big showing of SVTs one of these years, it would be a blast.
As far as the driving school remark goes, yes it is for the insurance companies, but the guys who run the event also stress this point too. They won't just cut you lose on the track without a fair amount of training and there are instructors available at all times. I usually take an instructor along for at least one session to help fine tune my skills.
Thanks for all the interest!