brakes dids not change on C3 s but early models are probably not Stainless Steel Sleeved, and rust pitting was a real problem.. for the headaches you will encounter with used, I would rather get a reman caliper from Ecklers http://www.ecklerscorvette.com/corv...eel-remanufactured-right-front-1965-1982.html $89/wheel and lifetime warrenty.... or rebuild the ones you have yourself...kits are pretty cheap and not difficult to rebuild with a hone