What Master Cylinder? and more

Eric if you have the drum style combination (proportioning) valve your correct about a tee fitting doing the job just the same on the front wheels. If you have the disc style valve there's more in it. It also has a valve to slow the application of the front discs (having a brain fart right now, can't remember what they call it) so they apply at the same rate as the slower acting drums. I don't know how much this valve really affects things though because I've read where several people have converted to discs and kept the old style valve and said their brakes work great. It also has a residual pressure valve for the rear brakes to make them apply faster and give a firmer pedal. The M/C number LG gave is a good number at most auto supply stores. The only problem I ran into when I converted to discs was I went through 3 of these rebuilt M/C's and they were all junk. I found out NAPA can order a brand new M/C for just about $15 more than one of the rebuilds. Ordered it and it was a very nicely built piece and works great. Sorry but it's been too long so I don't have any numbers but just go to NAPA and ask for one for a 74 Dart or Duster non power disc brakes and tell them you want a new one. They will probably have to order it but new sure beats one that probably has been rebuilt to death.