[WSSix]

Alright, I answered my own question on the yoke/u joints. In 76, GM switched to the 3R u joints front and rear. 3R stands for the Three Rivers plant that made the drive shafts. The official size of these is 1344. U joint sizes increase with number. So 1344 u joints are slightly smaller than 1350's. Meaning, switching to 1350's is a waste in most cases, especially mine, as it's barely larger.

Also, I found out that while Chrysler ring gear bolts are the same thread as GM. They use a smaller head. This is bad unless you use a washer as well. The bolt will back out. Best to use a correct GM or GM size bolt. Don't think I'll need ARP bolts but I'm getting ready to order my gears so we will see.