While swapping to NA rear end may be the cheapest most effective acceleration upgrade you'll ever find for the TT Z32, I'll keep the TT gears thank you, the car will be fast enough as is. Also, I reeeeeeeally like the idea of:
3.692 TT rear = 190mph at redline.
WITH A
5SPD!
__________________
1989 240SX Fastback. . . . . . . . . . . . . . . . . . . . . . . . . . . 1995 300ZX Twin Turbo
Warning: Objects in mirror aren't as fast as they thought they were.