I'd installed 1/2" wheel studs in the rear axles a while back so while working on body panels I also got everything together to install the Baer discs on the rear. I had Moser tapered axles with Moser Ford style housing ends for drum brake application welded to a 8.5" GM housing so switching to disc brakes with an internal drum parking brake in the rotor hats is an unusual swap.
It turned out to be a bit of a puzzle to figure out how to actually assemble and required some minor fabrication to make it all work. Rather than explain I'll just post pics since it's unlikely very many people will be in the same situation since most people do the disc upgrade at the time they install axles etc. and wouldn't be in my situation since they'd get housing ends welded on for disc brake applications.