master cylinder

  1. 68 El Camino Mysterious Master Cyl Valve

    Brakes, Suspension & Steering
    This valve is on a 68 SS 396/325 HP El Camino with power drum brakes that my brother-in-law purchased to restore. We have not been able to figure out what this valve does or why it is there. We are not sure if it is original and we could not find any visual or written reference to it in any of...