One thing to be aware of, is that the mastercylinder fluid output connection point will have buildt check valve for connections going to drum brakes.
This means that the front fluid conn point (going to the REAR brakes) will have check valve....= you will NOT be able to blow air back into the reservoir.
Assuming you run disc in front,....you should be able to blow air back into the REAR reservoir of the master cylinder... = no check valve.
As for how the brake fluid pressure gets distributed via the valves underneath the mastercylinder,... I don't know what differences exists....
