I was told that I need a proportioning valve so I bought one with lines from a member here. I also bough a master cylinder adapter so I could run the newer style two bolt master cylinder.
So when I say I need a prop valve il talking getting a new adjustable one for the rear only. Sounds like your talking about a old factory one...not sure if that will get you where you want to be. But you already bought it so give it a shot I guess.
