Need to update on a brake issue I had and a shout out to a great vendor we have for these old cars. I had post earlier about a leak on the brake system proportioning valve that I got from Cass @ Dr. Diff. First one I installed had a defect in the main body where the top nut copper washer seals. Cass sent out another. Got that one and there was a ding in the same area but on the nut mating surface. He told me to make 1 out of 2. So I did and installed it. That cured the pesky leak, and I thought I was good to go. That was until I put a battery in the car and checked all the lights. Now the dash brake warning light was on all the time. Bled, bled, and bled some more, but couldn't get it to go out. Tried calling Cass, but got a recording saying that with this virus thing gong on he wasn't answering phone calls, but would respond to emails. So I sent him one that night and it wasn't long before he responded. We went back and forth for a couple of days with several messages. We finally pinned it down to the switch in the valve was probably faulty. He shipped a new one out priority mail and I had it in 2 days. This time he checked both the mating surface of the top nut as well as the switch before mailing. Got it installed yesterday and no more dash light stuck on. Checked the switch after removing it from the body and sure enough, it was shorted out.
So in conclusion, put an ohm meter on your switch and check the mating surface of the top nut before installing these new valves. AND in my opinion anyway, Cass is one of the absolute very best places to buy rear end, driveshaft, and brake parts/systems from. Great guy, knows the products he sells, and his customer service is second to none
Now to determine if my master cylinder is working as it should......