C9OA-2B091-A Cylindrical shaped brass valve, some times called the pressure control valve, brake valve or 'cigar' valve. 1969 disc brake cars have it mounted almost directly on the Pressure Differential Valve on the driver side fender apron. The pressure differential valve is also commonly called the 'brake distribution block'. We sell our brake distribution blocks complete with the proportioning valves.
Ford part # C7OZ-2B091-B, casting # C9OA-2B091-A.
Here’s a video to help you rebuild the proportioning valve so that you can corral your Cat or Pony without fearing for your life.