um, don't look now but the NHRA DOES have weight restrictions in its class, as well as most other import (and domestic for that matter) organisations.

If you are thinking that the NHRA will raise weight limits for safety, wrong again. Lighter cars are safer as far as impacts are concerned, in fact, that is why 25.1-C was instituted for "street" cars running faster than 7.50. The regs were for Pro-Stock cars that weigh 2300 lbs, and a street car weighing 3200 lbs is MUCH more dangerous and thus required much more tubing in its cage.