Quick update. I pulled the back cover in sunday, the gears and posi look solid, no real wear issues I could see. Oil looked black but nothing shiny in it (I was expecting glitter...). Pulled the pin and the c-clips and slid the axles out.
Got the backing plates off yesterday and will be cleaning them up and painting them tonight... then assembling the brakes. I have the outer bearings now, so once I find a slide hammer I'll slap those in and button the whole thing back together. Then the fun cleaning the axle!
Pics probably this weekend, my garage is too dark for my camera to take decent pics. I need a few more lights!