88 DX civic, sitting in a feild for years, just swapped a new motor in and changed all the brake lines.

Master Cylinder was replaced with a known working model. I bench bled the mc and bled the lines in order and out of order. Its POSSIBLE that there's still air in the lines, but highly unlikely. I'm getting braking pressure to at least one rear wheel, I don't know about both. Pressure is constant, the pedal isn't mushy or anything, but little to no pressure to front lines, even though there's fluid coming out of them. One caliper was replaced with a known working model from a different hatch, the other is the old old caliper. So its possible to have a seized caliper, but the other side still isn't working.

Any ideas? Could I have a bad prop valve? I changed it to a 40/40 for a near future rear disc install. its the only thing I can think of......