OK I milked this one long enough. I started to bleed and found that the front 2 cracked free fine. Then eventually the driver rear bleeder broke free. The passenger rear wasnt having none of it so I kept soaking it down with PB Blaster since I didnt want to have to replace the caliper. It was only around 3yrs old. I kept at it and finally early this afternoon it turned less than an 1/8 of a turn so I kept on it with PB Blaster and it finally broke free at dinner time. Dodged that $75 bill for another caliper. It was so full of air at the rear that It took forever to get fluid out of the rear calipers. I cracked the rears open and started the auto bleed functon of the tech 2 and ran it like 5 times. Then I finally started getting fluid and air out of drivers rear. Still nothing out of the other side. After lots and lots of manual pumping I finally got fluid out of the passenger rear. Ran a few more auto bleed cycles and had son do lots of manual pumping and got steady fluid out. Went all the way aroun manual pumping and pedal firmed all the way up. I dont believe I actually got any out of the front calipers at all. It seems the line that busted ultimately fed the rears. The line was the forward one of the master cylinder and the lower right port on the ABS manifold.
I really hate steel brake lines.