You can also try real fast short pumps of the pedal. Keep the bleeders shut and just give real quick short pumps, this helps bleed the master and pull air out of the lines.

If you are worried about the height difference, jack up the body and let the axle you are working on hang lower then the master, reverse the jack stands to bleed the other axle. I have even parked on a steep hill so the fluid would tend to run to the lowest point.

Joe