I have the brake cyilinders, shoes and pads all sorted out now. I had to take the rear drums to a machine shop to get them turned because they were too big for our lathe.
Both sets of rear shoes had oil on them. In what felt like the most rednecked thing I've done on this project, i brought home a old propane grill from the dump, fixed it up so it would catch fire, and baked the brake shoes in it. It seemed to work like a charm.
All four wheel cyilinders appear to have been leaking - I found brake fluid behind the rubber caps on jist about all of them. I'm hanging onto everything I'm replacing until I'm certain it can't be rebuilt.
I threw about six cans of spray paint on the tire rims and the brake parts.
While I'm putting in the rest of the brake lines, I took the external parts off the rear differential. I popped the back cover off and cleaned the disgusting metallic sludge out of the bottom of the diff housing (it didn't seem to have anything terribly concerning in it).
My next objectives are to clean up the vacuum shifter, and I had to scrape a quarter-inch of grime to get at the bolts holding the pinion housing on, so I need a new seal up front.