PRODUCT DESCRIPTION
Fits: 1971 B-Body, 1970-71 E-Body Hold-off Valve
Brass 3 Port Valve Disc - Part 2 of 2 for disc brakes
If your Mopar had factory disc brakes you had the valve pictured above that was used in junction with the distribution block.
This is the distribution block that is mounted below the master cylinder which feeds fluid to all four wheels.