Proportioning valve
If you do not have disc brakes now the line from the rear will be long enough for the one piece valve. If you add the hold off valve you will need to cut your line. The newer one piece disc/drum fits where the drum/drum valve is now. Should bolt right in. Get one of these there are two styles early 70-71 and late 72-76. The newer round style are not that good.. These styles below Wheather head and Kelsey Hayes are rebuildable. By far the better to buy.
1970 - 1976 Mopar Combination Brake Valve Seal Kit | Muscle Car Research LLC
1970 - 1976 Mopar Combination Valve Rebuild | Muscle Car Research LLC
If you do not have disc brakes now the line from the rear will be long enough for the one piece valve. If you add the hold off valve you will need to cut your line. The newer one piece disc/drum fits where the drum/drum valve is now. Should bolt right in. Get one of these there are two styles early 70-71 and late 72-76. The newer round style are not that good.. These styles below Wheather head and Kelsey Hayes are rebuildable. By far the better to buy.
1970 - 1976 Mopar Combination Brake Valve Seal Kit | Muscle Car Research LLC
1970 - 1976 Mopar Combination Valve Rebuild | Muscle Car Research LLC