What do you think of this proportioning valve? It's a KH Disc brake proportioning valve for 11" front disc brakes with 11" X 2.5" drums in the rear. This was from a 1978 pickup. And here is a photo of a new master cylinder that I would use as a replacement. What do you think of that? Am I heading in the right direction? Short of going to the junk yard and looking for the parts (which I would love to do, in warmer weather) , but I might think it would be rather hard to find some decent parts around here. Thanks guys. Do appreciate the help.