I've got a 67 camaro. just recently i was driving down the road heard some squeaking and started smelling burning brakes. so i whipped it around and went home. i let the rear brake cool down and pulled the caliper. i found that it had seized up. so now im in need of new calipers as i was advised it wasnt worth the hassle to rebuild them. the problem im having now is that i dont know what new caliper to get as the conversion was done by a previous owner. its a single piston. are all gm single pistons relatively interchangeable or what. i dont know and dont want to drop money on something that won't fit

thnx john

Was it a stock (drum to disc) conversion ?

Does it have drop spindles ?

Are they 1 or 2 piston calipers ?

Still have the old owners phone number or address ?

im not sure i looked at the logo on the caliper it says ARC which i looked up and they made break calipers for all different companies in mid 70s

its 1 piston caliper

as for drop spindles i have no idea

oh and no on the old owner

Check out that the caliper is free to float if it's a floating type. Check out your brake hoses for plugging, also that the brake pedal is allowing the master cylinder to fully return and vent fluid back into the reservoir.
David

A picture of the caliper wiould be great. May not need rebuilding, other problem as David suggests.

o i forgot when i twisted out the vent screw there was no oil that came out. i assumed that was a side effect of the seize up but i didnt know so i thought id mention it

so i checked my car out earlier and it seams their is a blockage in the lines. should i replace all the lines since theyre all probably aging or just find the blockage and replace that one

I think the "most common" rear disc conversions use the "cadillac" single-piston rear calipers with the E-brake built into the piston OR just use GM "metric" calipers without an E-brake at all.

If you can't provide a pic, the following would help get us in the right direction:
-- number of pistons in the caliper (I'm guessing 1)
-- piston diameter (Guessing 2.5")
-- Distance between caliper mounting bolts (~5.5"?)
-- rotor diameter (~11.16"?)
-- rotor thickness (0.91"?)
-- Do you have an emergency brake?
-- If so, does the E-brake cable hook up to the caliper?

Oh yeah, and check the stuff David mentions too. Could be a plugged line or gummed up caliper slider bolts.
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