4 piston disc brakes

About right if it includes the spindles and dust plates. Primo price if the booster, MC, prop valve and tubing is included. The UCA is the same as 9 or 10" drums, but the lower ball joint differs. You can get rebuilt calipers on rockauto for ~120 ea, depending on if you have cores. A guy here sells a nicely rebuilt kit for $900, I recall w/o booster/MC. Insure no critical parts are missing. Some have gone bonkers trying to source the special hose brackets that attach to the calipers and dust plates alone can command $100/pr.