Welp, I got one side apart this evening. The cylinder itself is still usable, but I had to bust up one of the end caps. What I ended up doing was un-bolting the cylinder from the backing plate after I got one end cap busted off. Then I was able to use an air chisel with a punch on it to knock the cylinder inboard of the backing plate where it was 'loose'. Once it was loose, then I was able to reach through the 1/2" hole I drilled in the front side of the brake drum with a long punch and pry down the pushrod/adjuster on the side I busted the cap off of. This allowed the whole cylinder to cock sideways and the shoes to retreat. Didn't tear up anything else. The p/n on the cylinder is 5300892.
