Felt good enough to try to mess with the brakes for a little bit today. Managed to install the Proportioning valve to the rear brakes (3/16" SAE). I still need to find the right size front brake line (metric) fitting and a Junction T for the fronts. None of the local auto parts stores had the metric thread that the front lines use. I have to wait til next week when a specialty brake shop is open to acquire those parts.
Found this elsewhere, and wanted to save it for anybody's future use. This is a driveway /shade tree way to preform a HCU bleed without an expensive trip to the dealer or brake shop.
Perform conventional brake system bleed.
Prepare an appropriate method of connecting individual circuits and wires to ground. This connection must be sound, with very low impedance to the battery negative terminal (can use some stainless hat pins and alligator clips on test leads).
Turn the ignition switch to the ON position.
While an assistant presses down on the brake pedal:
*a. ground circuit 599 [PK/LG], pin 19. (4WABS Relay #1)
b. ground circuit 510 [T/R], pin 27. (Rear Dump)
c. ground circuit 498 [PK], pin 15. (Right Front Dump)
d. ground circuit 496 [O], pin 26. (Left Front Dump)
The pedal will fall to the floor.
Disconnect the ground connections made in parts 4b, 4c, and 4d. *Leave the connection made in part 4a. Allow the brake pedal to return.
Repeat steps 4 and 5 once more.
Ground Circuit 539 [PK/LB], pin 29 for one minute. The ABS pump motor should run for the entire minute.
Perform conventional brake system bleed.