Welcome to CHR, ottathom. Both Jeff & Don are steering you right, and both know their Fords! The tranny in the Fox body Mustangs was indeed the T5, varying in torque capabilities through the years. There are lots of Mustang specific sites out there, like this one dealing specificly with the swap you're wanting to make T5 Swap, T5 Conversion, Mustang T5 Swap, Auto to Manual Transmission - FordMuscle If you're going into a competition situation and if you have the flexibility to run other than OEM parts you might consider using a TREMEC TKO instead of the T5 - a much stronger tranny, and lots of the old T5's were driven really hard.