1978 k30 Brake lines

[DBear]

Originally Posted by wildwilly4x4

yes, there is "block" on the front of engine crossmember. That "block" is called a combination valve. This is combination of proportioning valve and a residual valve. They are a pretty generic part typically designed for either Drum/Drum, Disc/Drum, or Disc/Disc systems...front/rear respectively. A quick search on ebay will usually find you one for less than $50, I've found it difficult to lookup at local part stores sometimes. Obviously if you are going back with stock stuff, you will need Disc/Drum for a K30.

This is what I have found...seems that it is the combo proportioning valve/residual valve


https://www.ebay.com/itm/32552557136...CPbhbX8AaDRgQk