1350 to GM conversion U joint?

I hope I'm not abusing this forum! Seems like I have a million questions! Here goes another. As you may have seen in my past few I had some rear questions. Well, I received my axles today from Moser and was told my rear will arrive tomorrow.
I was told that the carrier for the rear has either a 1310 or 1350?
Which I'm more sure it was 1350. Anyway, my stock driveshaft wont match up. Now heres where Im confused. I think he told me I could get some kind of conversion joint. One that would press into my shaft and mate to this 1350 or whatever ya call it. I will order a whole new shaft, but I dont want to until I replace me 350th with a new 700r. (not for a while,wife will throw me out!)
Is there such a joint??? And where can I get it. Thanks...

Yes there is such a U joint Your parts store should be able to get it for you if they don't stock it. I use them all the time as I use mostly 9" rears and chevy drive shafts. If your length is right all should just go together as stock.
Charlie