E-brake different from a 78 to a 80? .also proportioning valve question

[sircrunch]

keith, thank you very much for your help and research. Right now I'm looking forward to getting the truck finished. The truck was smacked hard in the front. I've replaced the frame, core support, hood, one fender, one inner fender, the grill, the bumper, and more. Its been a lot of hard work, but its about to be drivable. I'm crossing my fingers that the trans is good. The truck starts and runs great. I can't put it in gear yet though because my brakes are not hooked up yet For what its worth, I found out the hollow bolt that goes into the caliper from the rubber brake line in the front is a bigger diameter on my big 10 than on the standard. Little unexpected things.