DodgeCoronet.com

I did not plumb one in on the advice of a salesman from the brake company I bought some stuff from. He told me the adj prop valve would be enough. I'm wondering if this is why I'm getting so much pedal travel AND the darn low brake pressure lamp. Thoughts?
Does it matter where this gets plumbed in-before or after the prop valve?

Need more info. Drums or discs in front and rear? What MC?

Disc conversion-Pirate Jack booster and master-new reproduction stuff. Brand new Distribution valve and pretty much everything-bled 3 times now too.
I did get a tech article from my brake line place last week on how to bleed the valve if having low pedal or light on but havn't tried the procedure yet.