Today I picked up a 93 c1500 short bed for dirt cheap. It has a 4.3 auto and is in decent shape for being in the Midwest. But the problem with the truck is that the PO had to replace a brake at the Proportioning valve and stripped the threads, I've been searching all night for a new one and it seems that it has been discontinued. I haven't called any junkyards yet due to its Sunday but I don't like to cheap out on brakes so if anyone knows a interchangeable part it would help me out a lot. Thanks for any input