The top loader & Tremec 3550/TKO all use the same bellhousing. The clutch is the same as the T5, along with the cable, the arm, throwout bearing & quadrant.
If you want a better trans, get a used Tremec 3550 or TKO. You won't break a 3550 on your car unless you shift without the clutch or some other dumb thing like run it with no oil. I have a 3550 and it is strong, smooth shifts fast and smooth. You can powershift all day long and not hurt it. I never lift to shift when I am full throttle flying.