Generic Brake Kit Need Help With Caliper

Hello
My 65 Coronet came with a generic disc brake kit installed long before I owned.
Have a sticking caliper now and am trying to find a pair. This part # doesn’t show on Rock Auto. I am a GM guy doing my first Mopar so not familiar with calipers. Are these A or E body?
I cannot take credit for blue paint

Dan

73- A body, F body and some others without the pin type caliper which uses a D39 pad. Yours uses, like mine, the D84 pad. The D39/84 are industry numbers for pad style. When you get one, make sure the piston diameter matches yours. Don't want different sizes side to side. E body uses the D39's. Have you tried cleaning off the sliding surfaces and lubing with a very small amount of brake caliper spec grease or anti seize? Maybe there is a burr holding up the works?

Mine started doing this. Just unbolted them, wire brushed the sliding surfaces, a tiny bit of silicone brake grease, and bolt back together. Problem solved.

Another good test is trying and push them back with a c clamp. Compare the difficulty in turning the clamp.