I'm not familiar with the term manual trac loc.
Are you referring to the 8.8 Trac-Loc Rearend?
If so then yes it is a direct swap.
The next question would be why would you want to do such a thing?
You have from the factory either 3.08 open rear end or 3.27 trac loc that was the option.
All m5r2 equipped supercoupes had a 2.73 rear.
It would be like going backwards in the performance department.
I have new Ford Racing 3.73 Trac Loc Aluminum pumpkins for $540 plus shipping, let me know if you are intersted in one.