[flathead4rd]

When I put disc brakes (front only) on my 50 passenger car with original master cylinder under the floor the only change I made was to remove the residual valve from inside the Master Cylinder. This is the Jamco disc brake conversion kit and that was their instructions on what change to make with the MC. Been driving it for at least ten years like that and no problems. I changed to DOT 5 brake fluid about three years ago and still no problems. The braking is a major improvement over the drum system.