Your new rebuilt LF caliper may have been assembled wrong. We've seen several cases where the OUTER half belongs on the other side of the car. It will look OK and fit perfectly if put on upside down. But it will be impossible to bleed the air from the lower-outer cylinder.

Look at the top of the LF caliper, at the line where the inner and outer halves meet. If you see a "dimple" (punch mark) next to the joint line on the outer half — it's wrong.

The factory puts punch marks on the bottom of each half, so they can be matched correctly when rebuilding. But sometimes the rebuilders aren't careful enough to check for the matching marks.

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Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.