What Differential Do You Have in Your 1965 Barracuda?

This is good information, but I have a question. Would a build sheet or anything else indicate if a ’65 A body came with an 8.75? I guess I’m wondering if you put the correct 8.75 in a ‘65, would it technically be correct? My Dart GT was built late in the model year, but it had a 7.25 when I got it. It’s an original 235hp 4-speed car.