Depends on how much power you are going to be pushing. If it is below 350hp I would use the ford racing t-5 rebuild kit and call it a day. A better clutch wouldn't be a bad idea either.
98' Mustang GT coupe, CAI, trickflow 75mm intake, 3.73 gears, O/R x-pipe, flowmasters, short throw shifter, 24lb injectors. 183k miles
95' Mustang GT vert: AODE, 2.73 gears, O/R xpipe flowtech mufflers , 410,000~ miles. (totaled, sitting in yard)