Kelsey Hayes Brake Questions.

CrazyManInCincy said

The pistons are sticking. ... with the Kelsey Hayes four piston brakes.

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I recall that the Stainless Steel Brake Company (SSBC) got their start by making stainless pistons for the Kelsey-Hayes brakes since corroded, sticking pistons was an endemic problem. They did it more for Mustangs, which used the same K-H calipers, since a lot more of them.

Flush thru new brake fluid every 2 years to avoid such corrosion. DOT 4 or 5.1 is the best glycol to use today. If you use DOT 5 (silicone) like me, no more internal corrosion concerns.