Rebuilding Kelsey Hayes front disk brake calipers?

After attempting to rebuild my kh calipers years ago, one came out good and the other kept leaking! Rubbers were a pain in the ***! Reason for rebuild was the pucks were freezing up! I said screw it and found a brake vender can’t recall who! Sent my cores to them and sent me rebuilt ones that were sleeved with stainless liners! Money well spent! Never looked back!
Stainless sleeves were the norm on older Corvette disk brakes when rebuilding them for the same reason.