[rotorwrench]

Hydraulic braking systems were designed to have more braking on the front than the rear after the switch over to Bendix style brakes in the late 40s for Ford and Mercury vehicles. They did this by using smaller bore diameter wheel cylinders on the rear locations and wider front shoes in later applications.

Mechanical brakes for model As made from mid to late 1928 on were designed to get the braking action more equal but there is a difference in the actuator shaft arm lengths between front and rear brakes that appears to favor the rear brakes as far as force application during the braking process. When you look at the model T it becomes apparent the model A was Ford's first chassis to have four wheel brakes. The early ones had an equalizer design so they differ from the later changes. Ford was new to all wheel braking systems at the time and the tires were still large diameter with narrow track so they just wanted the car to stop better than the model T.

I would adjust them by the Ford instructions if there are no modifications to them. The shoes need a good contact pattern. Part of that is by adjustment but arcing the shoes to fit the drums is the best way to get it right on the money. A lot depends in whether it has cast or stamped steel drums and the type of shoe lining material that is used.