Along with the '92-up calipers? How about the matching, larger master cylinder, and larger, double-diaphragm booster?front brakes upgraded to 92 and later style rotor and hub assy.
JN/JB5 or JB6 booster on left. Crappy JN3 pancake booster on right.
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When it comes right down to it, upgrading the rear brakes from the 254mm (10") leading-trailing shoe drums to the ENORMOUSY better 11.x Duo-Servo drums makes more improvement than upgrading the front brakes, although both ends do need help. Upgrading the rear brakes is harder/more expensive on a C1500 than a K1500 due to the 5-lug wheels.
Did you bleed the RWAL? An '88 should have a bleeder screw right on the unit--no scan tool needed.Brakes still suck but it stops well just a little more travel in pedal than a new truck.
Rear brakes being out-of-adjustment is epidemic with the 254mm leading/trailing shoe drums. Nobody uses the park brake.
From who? I need them on my two trucks. I've heard from multiple sources that the Polyurethane replacements are too stiff.Cab mounts are on order as well.
'Course, I hear that about Poly control arm bushings, too, and I've installed lots of them with nothing but wonderful results.
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