When you bench-bleed the MC, are you getting fluid flow from the port that goes toward the front? If so, there has to be a restriction somewhere downstream. I'd second the above suggestion to follow the fluid flow one connection at a time until you find whatever is causing the fluid to stop flowing. It's also possible you've got a piston seal inside the MC that's bypassing fluid and refusing to develop enough pressure to force the fluid down the lines.
Jerry
Contacted the manufacture of the master cylinder. They believe the MC is fine, and that one of the wheel cylinders might be the issue(leaking air). So tonight I will be doing what you and they suggested, removing the wheel cylinders from the lines and plugging them. Trying one line at a time etc. I will let you guys know what I find/
