64 chevy c10 4 wheel disc conversion.. brakes will not build pressure nor bleed...

I bought a power 4 wheel disc conversion kit frop cpp install went smooth with few hiccups. then murphys law kicked in..
2 days 2 big bottles of brake fuid later..I cannot get any of the 4 brakes to bleed.started from the front no go.. started from the back nothing.. i get no pedal no pressure after pumping.. i bought a new m/c and bench bled the m/c. bought a vaccum bleeder.. no dice.. so next step tomorrow is to track any line clogs and maybe gravity bleed the system.. anyone else run into this problem ? if so, any suggestions?

Sorry for the late reply; With the mention of 2 different masters I would say you have some restriction in the line or you have not done a full bench bleed.