from what i've read on supraforums it would be cheaper to just buy a TT instead of trying to do a NA-TT swap. you'll need a motor, motor mounts, tranny, driveshaft, rear diff, ecu, bigger brakes, intercooler and piping, power steering pump, and some other shit i can't think of right now. you can do it for less than $7-$8k if you do all the work yourself but i'm not sure exactly how much work is involved.