Which rear yoke do you have? Their are two common variations, one uses a smaller joint than the other. If your lucky you can come up with the yoke that uses the stock 2-3011 autozone u-joint. The other one yhey also stock, most of the guys know it as the bast***d joint. I dont remember the number off the top of my head, it's a 3-something, if you tell them to give you their last joint in sequence that is it. I will get the number for you tommorow.
If the shaft has outside snap rings there are two possibles.
3.622" yoke width / 1.063" cup dia. #1-0134
3.622" yoke width / 1.188" cup dia. #3-3140
If the shaft has the plastic injected keepers (inside snap rings on replacement joint) you will have four options depending on third member yoke width and cup diameter.