The New, Newer Project: Part Tres...

[njsteve]

Correct. My mechanic buddy suggested the same thing. I have an NOS hose coming today. Whitepost called and it's $150 plus shipping to rebuild the valve. I also alerted them that it's a survivor car and not to refinish the valve,just leave the exterior as is.

I asked them to examine it when it got there and they confirmed that it was activated and locked. So when the rear hose collapsed internally, and froze the rear brakes, the pressure differential then activated the combination valve (which is what they call the proportioning valve in the 2nd gen cars).

[njsteve]

Whitepost does fast work! Even though they said it would take three days, I had it back in my hands on Friday, after they got it Tuesday. So I guess they mean including shipping time as well!

Once I got it back I plugged the openings and let it sit out in the hot sun and soak, in a bowl of Evaporust, so the surface rust would wash away. This is how it looked after an hour or so. I then removed the plugs and used brake clean to make sure all the internal passages were free of any residue. It's interesting how you can see the "3 170" date code stamped on both sides.

As for the original rear hose, I removed it and attempted to blow air through the hose - nothing came out. It is completely swollen shut inside. So let that be a lesson on survivor cars with original brake hoses!

And the combination valve reinstalled and brakes bled. I took her for a test drive and the brakes work great again.