Proportioning valve question

[master 1969 c10]

I bought this kind of a set up from vender pickmup and on the proportioning valve is only one line hook up what do I need to do

[dfwright]

There must be at least two outputs. One for the front brakes and one for the rear, otherwise there's no "proportioning" to be done. I know some prop valves have two outputs to the front, one for each side, but the factory configuration on the 72, at least, was to have one output to the front, which went down to a "T" splitter at the crossmember, and then out to each front wheel from there.

The front output is usually on the bottom of the prop valve toward the front.

[donandal]

you should have three...

[Smokeem]

Where can you get a plug to cp one of the two outlets for the front brakes?

Thanks Rick

[dfwright]

Any decent auto parts store should sell the plugs. I got one at Autozone.