Forgive me....PLEASE!

I have a friend who has a B-Body MOPAR, specifically a 1963 Plymouth Belvedere 2 door sedan, 318 Poly engine 727 push button transmission and an 8 3/4" rear end with a (I think) 3.23 741 Sure Grip. It's really a neat car that is BEGGING to be a Max Wedge some day, but......right now he's having some rear end problems that are going to require some work AND probably some parts. I have a 1966 A Body & when I went to my manual I discovered the rear end assembly is entirely different on these 1963 models, starting with no end play adjustment. Does ANYONE have any pictures, diagrams, specifications, trouble shooting information...on this 1963 B-Body rear end? I KNOW this isn't an A-Body problem, but I'm not a member of the B-Body group, so I thought I'd give it a shot here. Anyone????