[Found!] Proportioning valve

[pete9857]

For a 72 Demon with non power disc brakes

 

[RedFish]

Brake fluid draws moisture, causes rust. Used and open valve could be like used master cylinder.... junk. Good luck

 

[Mattax]

'72 would have originally come with a combination valve.
That's a distribution block with safety switch and proportioning valve.
Illustrated here: 1972 Imperial & Chrysler Disc Brake Service Repair Book from the Master Technician's Service Conference (Session 293)
Rebuild kits are available.

 

[pete9857]

Im aware of junk ones and cant rebuild, dont have 1. Too much cabotchery by previous owners

 

[daves66valiant]

I have A couple available. 73 and 74 valves based on markings