brake bleeding..WTF?

x2, and you should start the bleeding at the wheel farthest from the m/c, which would be right rear.

With nothing in the rear system, the brakes will work, and stop the car using only the fronts, but the pedal will go to the floor, and may not keep enough pressure to hold the car from moving once it's stopped.

I believe the prop valve will have the internal piston all the way to one side and trying to send more fluid to the rear, since it is starved.