theres already a 69 camaro competing in "formula-d" but i dont think its doing all that well. Ideally those drift cars are supposed to be small and nimble to pull off some of the crazy stuff the really good drift drivers can do.
as far as it not being a sport.... i couldent disagree more. just because they arent going for fastest time specifically doesent mean it doesent require skill. i honestly think that the best drift drivers are some of the best drivers out there, period.
and for the record, theres nothing wrong with a 240sx. heres a pic of my buddies old car:
may not be everyones taste, but i thought it was awesome