ok let me try to help but have some shitty tools here at work so be close measurements :homer:I was hoping @snowracer could help us out with this one. He is one of the few people I know that could hold each bearing in his hands at no personal cost.
On another note, if it was different between the two pinions I wonder if you could look through the bearing books and find a conversion bearing with the right od and id?
outer bearing on 11 and up diff
race OD is 4.125 and bearing ID is 2 inch
race OD is 3.25 and bearing ID is 1.625