Hello. My brother ahs a '65 Mustang that originally had a 4 spd. He did a conversion to a T5 with some aftermarket crossmember and some other conversion pieces. He is hating the T5 right now since he put the 347 stroker in. It just isn't holding up. He wants to put in a Tremec 5speed. Would one fit in there with the T5 conversion he did or does he need to find a whole conversion setup for a '66 if there is one? Thanks