When I bought the burban 4-5 years ago it had I think the original axles in it. Round cover Eaton rear and closed knuckle drum break 44 front. Now that I think about it, I bought it without the axles, I didn't want them and got the truck little cheaper if I pulled them and gave them back. ATT wanted to go 3/4 ton, already had the axles. I put in a 44HD up front and 60 rear from a 79 1 ton Ford.
After I put those in, drove it around some, and the t-case was growling pretty good on decel. I was gonna swap in a 465/205 combo, but in order to do that, needed to change the master/clutch cylinder since they were in the same case, crossmembers and some other stuff, but after a while, didn't have the money, correct tools or a garage to do it.
It needs a lot of work, every panel has rust, and didn't want to see it rot away anymore, so I sold it. After I sold, it sat for couple years. Go figure.
If you need a good hood and door (which it does, why I got the new pieces) Wood's Auto has them, inless he scrapped them.....