Brake problems!

[BudTX]

The brakes on our 1983 K20 have been feeling a bit mushy, and gottee worse since adding the lift and tires. When I had the lift put on, the shop added longer brake lines, and the mechanic told me that I would need to re-bleed the brakes again.

I tackled this on Saturday, and may have really screwed something up. Here is what I did; please critique this and let me know what steps I need to take to get this fixed:

I started off by checking the brake fluid level in the reservior, and then got my wife up in the cab to pump the brakes for me while I started on the rear passenger bleeder screw. I told her to pump the brake pedal three times and hold the pedal down after the third downward stroke and hold it until I said to relase it. She did, and I opened the bleeder screw (attached to a hose to catch the fluid). Not much fluid or air came out, so I tighted the screw back, had her release the pedal and had her pump/hold again. Still not much fluid or air came out.

I went back to the fluid reservoir and noticed that I had not fastened the reservoir cover back on (I'm an idiot), and the pumping had caused fluid to overflow from the reservoir. I re-topped the reservoir, securely fastened the reservoir cover back on this time, and went back to the rear passenger bleeder screw. This time, her pumps/hold produced a few air bubbles, and the fluid started flowing better. We repeated the pump/hold/release process about 10 times (I tightened the bleeder screw immediately after the fluid stopped flowing each time), checking the reservoir level periodically and adding fluid to the smaller reservoir side as needed. I then went to the rear driver's side.

I noticed that the bleeder screw on the rear driver's side has the shoulders stripped off, and there is no way to loosen it. I'm not sure what to do here.

I then went to the passenger front side, and repeated the process. No problems at all. Same for the front driver's side. Fluid added in this process refilled the larger reservoir side as needed.

When I started the truck up for a test drive, the brake light came on after getting underway. Pumping the brakes would make flash off and on, but the pedal feels mushy and stepping hard on the brakes makes them go nearly to the floor.

I repeated the bleeding process above, hoping that it was just air in the lines from my failing to replace the reservoir cover screw up. No air came out at all, but my wife commented that the front brakes would go all the way to the floor during the "hold/bleed" process, but only went about 1/2 way before stopping during the "hold/bleed" process on the single side in the rear.

I would appreciate suggestions on what I should do now. If I have to, I can limp it into the shop tomorrow for a diagnosis.

Thanks in advance,

Bud