little update. my manager at work is a car guy, used to work at a brake shop, so he's been helping me fix it. we pulled a perfect rust-free line at the scrapyard, and managed to get it put on. the part that the scrapyard guy called the proportioning valve was horribly cross threaded though, so after trying to get it on a few times, we went back and pulled a new one. everything is hooked up now, but no brake fluid is going through the new valve at all. so i'm either missing something, or we pulled a clogged/bad one.

this is turning into quite a bit of an ordeal

edit: pulled a new abs valve, and now i have brakes again! next project, useless but pretty led strips in the cab. nothing can go seriously wrong there I hope.
another edit: i have horrible luck. on one of the rgb led strips i put in, which i didnt bother to test after wiring, the green leds are dead