what happened to the original tranny? me personally prefer to rebuild than replace with used parts. had a so called "good low mileage" engine installed when my original engine threw a rod, to make a long story short, 3 months (7000kms) later had to get a rebuild engine and got stuck with a $5000cnd invoice. whats wrong with your tranny and how much is it to rebuild? if its the stock diff i'd say rebuild with a quaife...worked for me 
95 SE MTX
DH UIM, 65mm TB, SC CAI, Quaife, Centerforce, Fidanza, UR Pulley, F/R Strut Braces, Cross Drilled Rotors, S.S. Brake Hoses, 18" Enkei RS5, SVT Engine Mounts+Inserts, MSDS & y-pipe, Trubendz resonated exhaust & MagnaFlow cat
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