Hy Chad M, if the master cylinder is mounted below the level of the disc brake calipers, then 2 p.s.i. residual pressure valves are recommended to prevent backflow to the master cylinder from the calipers. That being said I don't believe that is causing your lack of pedal. I don't mean to insult you, but in trying to think where air could be trapped the only thing I could think of is could the calipers be upside down with the bleed screws facing down rather than up? I would be tempted to remove the brake lines from the master cylinder and plug the ports to make sure the master cylinder is not bypassing. Did you bench bleed the master cylinder?