Installed the rearend in the truck for a test fit, it'll have to come out again once I figure out the wheelbase adjustment needed due to the shackle flip kit and the pinion angle once the engine is back in (stupid me didn't bother to check the angle at the transfer case before I pulled the engine).
Finally removed the rear bumper & tailgate, someone at some point had thought it was a good idea to weld a bumper bolt in place instead of, I don't know, replacing the bumper bolt or finding the right nut for it....... Ordered up new bumpers anyhow as this truck had the style with the rubber strip across them which I'm not really fond of.