The Kelsey-Hayes Disk Brake Swap Thread

Real good writeup. I'll add: These cars, with discs up front and 10" drums in back, were well known for scary-easy rear lockup. I took a page out of Chrysler's book and applied the fix they released in 1962 for police cars that were also prone to scary-easy rear lockup: smaller-bore cylinders in the rear brakes. Read about it here and here. Get that: they knew how to fix the problem, the parts were right there on the shelf, but despite "Consumer Reports" and every car mag bìtching about scary-easy rear lockup on A-bodies with front discs, Chrysler stared at the sky and said "Huh, looks like rain" and kept putting the big 15/16" rear wheel cylinders on.

You don't have to put up with it, and you don't have to futz with an adjustable proportioning valve. The smaller-bore cylinders are an easy, cheap bolt-on that solves the problem without creating new ones.

13/16" bore rear wheel cylinders are NAPA-United 37696, Raybestos WC37696, Wagner F113704, or ACDelco 18E268

A step smaller, 3/4" bore rear wheel cylinders are NAPA 37863, Raybestos WC37863, Bendix 34076, Wagner WC123412, Centric 134.67015, or Chrysler 4423 852.

Left = right.