[Derf00]

Assuming these are from a Chevy, the front Dana 60 is a direct bolt-in for your '91, and the rear pearches on the 14B will have to be moved out to the correct position.

 

[Derf00]

Found the same post on CK5 and he says that they are out of a CUCV.

I think you need to use your tape measure again. Posts like this adds fuel to the fire that gets Newbies roasted.