I suspect what you are looking for is a very rare combination as most tbirds came with the 8.8" rear end vs. the 7.5"
The 7.5 only came with the N/A V6 tbirds IIRC and i'm not sure if the LSD (Traction Lock) was even an option on those base models.
http://www.tccoa.com/articles/mn12-tech … on-lok.htm
Your best bet is to look underneath the 3.8SC as most all of them came with 8.8" diffs and TL units inside.
I think the automatic SCs came with 3.08 or 3.27 gears but even if you find one with 2.73 gears from a manual SC, 8.8" gears are cheap from mustang owners looking for "moar gear."
PS. If you do find that manual SC at the JY, grab the pedal assembly and throw it on eBay.
Myopic Motorsport's #888 Bosozoku Texino Thunderbird (1995 tbird w/ 93 V8 swap + shopping cart rear wing)