I know the tranny will go first if driven hard but whats the average max horse power and torque the stock motor will put up with? I looking for near 400 whp without having to build the motor yet. Going to start puttuing away for a new tranny. Anyways. And what turbo would get me there with TBE and tune? 18g or 20? or something else. would it handle a gt30r if not driven too hard? thanx.