I did the front; I wasn’t sure what I’d find so I just did the pads. The
rotor were OK; still in spec, a bit rusty but not scored very badly at all.

But, the rears. How do I get the rear drum off (15" wheel, 11" drum)
There is a nut on the axle, a collar to hold the nut in place and a cotter
pin through that. Do I have to remove all of that, or are the wheel studs
THROUGH the drum and not part of the drum?

Any help appreciated!