I was thinking of the master, however in 45 years of playing with the single piston calipers I have never replaced the piston assembly for pitting. Yes forgot the seal is stationary. I have had pistons stuck, but have always been successful in freeing it up.

I sold several of the pistons years back when I worked at NAPA. Some were damaged when people didn't know how to remove them. Some had phenolic pistons that they were replacing. Never researched where they came from.....Joe

The phenolic pistons were a Ford deal. Guess it is possible GM used them on something; but I don't remember ever seeing them on a GM car. We used to have Ferds and Lincolns towed in all the time with the front brakes locked up. Pistons would swell. We replaced them with steel pistons.

Back in 1998 i used new york stainless on my four pistons brakes cal. Don,t really know they are still in business but to this day they are perfect working order

Local auto parts store sent mine our, just mark them to get them back. Blasted, rebuilt, $35 ea. Then I painted it cast so it wouldn’t get all rusty. New bleeders too, covers, it was a deal.

I did mine a while back using Napa kits, every easy. Soak the calipers and piston in evaporust over night.

Thanks for all the ideas guys!
Buddy

I've also got a stockpile of ready to go calipers available - I have many dates too.

FYI, thanks - don't want to hijack this thread, just an FYI.
Anthony

https://www.yenko.net/forum/showthread.php?t=146099

Great info here. Thank you. Does anyone make a USA made rebuild kit? I don't like cheap imported junk in general but really find most cheap rubber products to be complete useless.

I have Oring installed and dust seals on 70 Camaro single piston calipers.....Can someone
educate me on how to insert piston thru dust seal ....Ive tried/failed using air to balloon the seal .............