This all gets down to definitions. If 6500 rpm is high, a 292 can handle it without huge dollars. If you are thinking 8000 rpm consistently, you probably want the shorter stroke motors.
If you are worried about setting sanctioning body records (SCTA, NHRA) plan on big dollars and in some cases like some NHRA superstock classes, 292s are not allowed as they were not car engines. If you want to drag race and set Inliner records, your motor choice will depend on which class you want to hit and the weight of the vehicle the motor is going into. If you just want to drag race in the inliner class or classes, the ones I have run have all been bracket racing and ultimate performance is not needed to win.
