Master cylinder connection

[Johns327]

For the CPP 1” bore does it matter if the connection closest to the mounting flange is connected to the rear brakes?

I have a new install and am trouble shooting a dragging brake issue. (4 wheel disks, 1955 2nd series under floor mount). When I loosen the line at the master cylinder the pressure drops and the front wheels turn freely but I have connected the front brake line to the connection closest to the flange. I’d like to know if that matters before I start bending new lines. Everything is new, I even pulled the master out today and pulled the guts out and mad sure it was all clean with nothing in those pressure vents.

My next test will be to leave the lines connected and loosen the master from the booster. My pedal seems to have free play but maybe there is something in that booster that is holding the plunger in. The instructions I have read say to adjust those depths, but not how.

Any help will be appreciated this is driving crazy.