727 vs 904 rear support

I bought a roller rear support from Cope but it wont go on the shaft. It binds about half way on. The shaft is fine, I think the machining is wrong and when the bearing was installed it compressed on the end.
Im just going to pull one of my spare 727's apart and get the parts I need. Im sure 904 is probably smaller so im not even going to pull one down to check. Of couse the part I need is the last thing in the case.