[beaterku]

That does make sense. Hrm. I will do some digging. Did a quick check,
Spicer makes a 1310 to 1350. I have a Spicer 1310 to 1330 in it now. I have not driven it though. I bet it has something to do with the outside dimension of the u-joints matching so you don't have any vibrations.

Good info. Thank you!