Quick update. After further exploration, I found out that the previous owner replaced a brake line. That line supplies the pressure for both lower rear wheel cylinders, and those were the ones with the seized up bleeders. So obviously there was no way to bleed out the air. So as a cheat, i disconnected that line and bled it using a plug at the end of the line. Now the truck stops on a dime. The rear brakes are still going to need to be replaced in the Spring but at least I know that the master cylinder and the boosters are functioning. Until then, at least it can be putted around the farm.
Last edited by comeaud; 01/26/2015 1:51 AM.