Phillip,

I believe the '46 has Huck style brakes, which means it has only one wheel cylinder per brake.

I have linked a semi-related thread about brakes that was in the Big Bolts forum. You might find more answers about your big-rig in there...good luck.

http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=6;t=001710#000000

Stuart