I'd ask whoever you trust to repair your transmission
if they're both FORD Mustang parts they might
you can also go to the library and find a CHILTON GUIDE for each model
A Chilton Guide basically tells you how to build the car from a pile of parts. With exploded views of assemblies.
But even if the screwholes line up, you may not want to, because they cut those gears by robot guided by computer and it may be the additional horsepower of a V8 was not calculated. You might strip the clutch.
or it could be that Ford used the same transmission for years. CHILTON should probably give enough specs on the transmission that you can tell if there's big changes.
The core joke of Hitchhiker's Guide to the Galaxy is that of course no civilization would develop personal computers with instant remote database recovery, and then waste this technology to find good drinks.
Steve Jobs has ruined this joke.