I had a Tremec in my capri years ago. I was running a N/A 294ci iron headed motor. Needless to say, it made very little torque and just under 420hp to the wheels. Had nothing but issues. The transmission spent more time at liberty's gears than in my car. Broken shift forks, exploded gears, twisted input shafts etc. They are heavy too. Alot of my troubles were clutch related though (way to much base pressure). They do make some strong aftermarket T-5 internals now-a-days. With an adjustable pressure plate, I would bet the beefed up T-5 will work just fine for you. You really should run an adjustable plate regardless of transmission choice. Also, definitely use a shifter with adjustable stops.