Does anybody knows where or who make aftermarket diff? I looking for someone that could make a diff. with the same gear ratio as a mustang, but with same pattern as my 12a diff. but stronger ( 9" in. ). Thanks, Roberto

 

Check this place out. They are popular with V8 swaps and bigger rear ends.

http://members.tripod.com/~grannys/TASAconversion.html

You might have to have them drill your bolt pattern, not sure if 12A wheels will fit.