82-85/87? S10 4cyl, pick-up w/ manual brakes.
You can still get them new, just make sure you also adk for G Body stock ones and compare them... that way you know you get the larger sized ones.
Most GM RWD 80's vehicles use the same 5/8" rear wheel cyls
These S10's used 7/8" rear wheel cyls.
Adding to this, find yourself a set of the rear GM aluminum drums... RPO J42: GM Aluminum Drums: GM P/N: 1255496
They were used on just about any heavily optioned RWD 80's GM vehicle... G-Body's,
B Body's, F-Body's, S-10's, & C-1500 (2wd) pick-up trucks & C-1500 Blazer/Jimmy (2wd full size).. they were used to shave weight for CAFE reasons.
I find them more commonly on
B-Body's... just bring some measuring calipers to make sure they are still within specs because once they get chewed past spec, they are junk... unless you can find someone that can successfully remove the old steel liner and press in another without destroying the cast aluminum.
The advantage?
The aluminum drums will shed heat faster, reducing brake fade.