VRG is pretty laid back. If you tell them you're 1300 cc and you want to run with 1275 Sprites, etc, they'll generally be OK....if you're in a class that's too fast for you, just ask to be moved down. It's not like we have trophies or money or anything.
The "classes" seem to vary depending on who shows up. I've raced in my class with a flathead Ford V8 special and also with a one liter Ginettas (curiously, both very close to me in terms of speed). I think thye really just want cars of equal performace together, regardless of engine size.
Actually, my car is 1500 cc (it's really a rubber-bumper Midget). The engine is bone stock internally, so of course, it's a true pig. And the car's heavy. Originally they put put me with MGBs and I got murdered. After I spoke to Mark (Palmer) they let me run with under 1300 cc cars, where I happily run mid-pack.
A decent 1275 Spridget will walk away from me on the straights, but that's OK.....it's fun to try to reel some of the guys in around the twisties. I'm building a "new" racer (an Austin A35), so I haven't done much with my Spridget this year. It's pretty tired, but I'm hoping to get a few more events out of it before I start racing the Austin.
This is it (below). Look forward to chatting with you at Summit!