94 front calipers.
96 V6 Master Cylinder (reman)
91 Mark 7 rear discs.

I spent about three hours tonight bleeding the brakes, first with a vacuum bleeder, then with another person pumping up the pedal, then re-bled the master and back around once more and still the pedal is soft.
What the heck?
My current guess is the reman master cylinder from Advance is a POS or one or more of the brake hoses is collapsed.

Thoughts?

Edit: I am in the process of replacing the rear caliper hoses as soon as I finish typing this. I suspected at least one of them as it would not gravity bleed at all.

Another thought is maybe air trapped in the Hurst Roll-Control Solenoid. Heading back out there......