If you really want to be competitive, build an 1989-1990 240SX for ITA. Then if you want to upgrade to EP, you strip and build the chassis and pump up the motor. If you want more, like turbos, bolt in the SR20DET. I have a 240SX ITS car and although it might be competitive somewhere, it won't run 1:39 flat at Road Atlanta like the BMWs. In fact, I think Chris' car has done a best of 1:43?

Steve