Congrats on your work.The rest of my brakes should be here today. Doing fronts and the rear drums, and replacing all the nasty old fluid. The winter storm had them locked up tight somewhere in Wyoming, which is understandable.
In the meantime I installed some SP-500 OEM spark plugs, since a member on here brought up a good point about heat ratings. I swear that after that the car runs just a little bit nicer (probably because I actually gapped them properly this time), and the heat is hotter than I remember it being. But it's probably just placebo. I know in theory a "colder" spark plug evacuates more heat into the cooling system, but I doubt the difference would be enough to notice. Either way, after a 40 mile highway drive I was being roasted out of the car, lol.
After more testing the brakes are all heating and cooling pretty evenly, so there was no real emergency.
Discs all around on my Buick Lucerne, last year so all is solid. Then, rear caliper started to leak around the parking brake shaft. Winter so I had a local shop replace the caliper. This made the pedal travel bit longer but after week of daily driving local back to it's normal short solid feel. Guess any change and things have to bed back in again. Those rears look very much like Bulls. New parts do not bed in for a bit of use. Local drives in winter takes a bit longer. And only one takes longer than a pair. On mine if I had good weather and nothing else to do, I would exercise the brakes and parking brakes. Have to remember to use the parking brake, (use it or loose it).