Oh yeah izzo NAPA is the place !
yerp the rear wheel cylinders for the 71's use to be about $95 a piece not too many years ago ...
I believe they're more towards $45 from Oreily's s%$%-house of parts trololol.
kylezone --- Yeah rebuilding calipers and wheels cylinders isn't that big of a deal AFTER you've been doing it for a bit
It is a safety issue and if that bothers you/a person then I'd just recommend purchasing the re-manufactured/new stuff off the shelf
You can also get creative and slowly pump out the pistons in the wheel cylinders .. while they're on the car (stay WAY away from them at this time).
I literally took a spare and loose clutch master cylinder + line = hooked to a wheel cylinder and calipers in order to hydraulically push out the pistons (worked great). Air pressure will work as well from a compressor , but get something to catch or give the pistons a soft landing. Keep your body parts away from this at all times with air pressure. You'll want to look for pitting , scuffing , and detoriation (mostly from moisture). If the cylinders themselves pass your inspection to your liking (remember none will be perfect) ,,, then perform a quick hone (fine sand-paper works in a pinch)... clean with brake fluid only ... lube it all up (you can buy special grease that is complaint with car hydraulic systems ,,, or just use brake fluid) ... and carefully squarely put it all back together ! Assemble the car ... take it around the side streets ... and I PERSONALLY take off the wheels to inspect for any leakage after about 50% of the time
. Everyone does this differently as you know. Are you 100% sure your rear brakes are not functioning ? Key to most of this is to keep the hydraulic system clean of anything other than Brake fluid.
I'm not a tech though
Mag wheels need the lug-nut torque checked twice in my experience.