After I installed the disc rear end, I tried to bleed the brakes - no go.
It seems like the truck had no rear brakes for a long time.
Here's the reason ^^^
I don't know why, but GM added rear anti lock brakes??? (brilliant idea - but uh, NO)
The ABS control valves were stuck, not allowing any fluid to pass by.
Plenty of fluid to the rear calipers.
The first time out for a test ride almost sent me through the windshield.
The brake pedal is much higher and is lots firmer. I barely apply pressure and the truck stops HARD....
All it took was 1 5/16" brake line union.