when i was reesearching rules for a heads up class i looked into the pump gas thing. it would definately be cool and has become very popular with the hot rod magazine shoot out.
i still think a turbo'ed LSx motor in a late thirdgen on stock suspension is the way to go. you can meet all safety and still have a car that only weighs about 2700lbs. if you back halve it the weight could go even lower. the only limit is how much money do you have to buy carbon fiber.
it is a possibility next year, just have to come up with a reasonable way to enforce teh fuel rules, prolly take a pretty good fuel company sponsor to get it done right.
later
tim