This item is an exact reproduction of the 1971-72 A-Body disc brake bracket. All factory disc brake cars had this bracket to mount the proportioning valve to the frame. Drum brake cars did not have this bracket, only the front disc cars. If the car is being converted to disc Brakes, this item is a must to place the valve in the right location so the factory lines will bolt into the correct location. Disc brake conversion companies use the wrong bracket that mounts the proportioning valve up by the master cylinder. All 1968-72 A-Body cars mount the valve at the frame. The valve will only mount correctly with the use of this bracket.
This bracket may also be used if converting a 1968-72 A-Body to disc Brakes using the GM 5 port valve. This bracket mounts the valve in the proper location on the frame instead of up by the master cylinder.