My vote is for the GT500 SP. I don't think the GT3574R will give you enough on the top with a large road course. You could prob. reach your horsepower goals with more boost but that will create ALOT more heat which can kill a track car or Auto X car quickly! I run around 12-14psi on my T78 and it stays nice and cool. Most of the other guys that track their FD's, as I'm sure you are aware, run around the same boost level. If I'm not mistaken, Fritz's 95 SSM R2 that is currently for sale had the GT3574R kit on it. He can prob. tell you about it
