Pedal goes to the floor... And i am stumped

The issue started before i replaced the master. I went the expense of a new unit as opposed to old. No other brake work was done. Got home from vacation, got in the truck to move it out of the way and the pexal was low. Next day it went to the floor. Pads are nearly full lining, and appear to be functioning. Rears are adjusted and functioning as well.

Master is in its original, level mounting position. As for vacuum, i have bypassed all emissions/vacuum junk and am running a carb, stand alone ignition, and the only vacuum lines connected are the dizzy advance, heater control and brake booster. No open ports remain. Bleeders are at the top of the calipers and i get no more air out of them. Initial bleed was with a vacuum bleeder, then old school method of a helper pump 5x, hold, i crack bleeder loose and close before letting pedal back up.

I will check the booster to master rod clearance this weekend, as well as do another bleed out.