bleeding brakes

:sad: I've inherited a '93 PAU with only 75K miles. Rear brake lines had rusted out and burst. Replaced them with NiCopp tubing and "like new" brake proportioner valves garnered for $8 a piece on Amazon. The section from the Master Cylinder to just past the firewall was not rusted horiffically...

I will try to explain in detail as I may have f'ed up ... After allowing my wife to drive like, 30 miles on a trip out of town to my daughters farm, we went to go to the grocery store, I noticed the brake pedal didn't feel right. About that time, the brake light on the dash came on and a chime...