Just an update in case anyone searches this topic:
The rear end was a 1/2-ton six-lug 3.07:1.
I went to Novak trans parts and got some rebuild parts along with the open driveshaft rear trans plate cover. Still haven't found a drive shaft. It has to be a 2 peace (with the slip splines between the u-joints) because the yoke at the transmission is fixed. I might have to go to a shop to have one custom built.
