proportioning valve??

Any Auto parts store 76- 80's dodge truck same as 76 up Duster, Dart. or Volari, Aspen. Looks different because of vender changeafter 73 but works perfect. It is called a proportioning valve for disc. distribution for 4 wheel drum. I believe I have originals used. if I do $50 shipped. correct line ends still installed. I would just cut the lines when remmoved from car to keep out the dirt when stored. Steve