Mopar used the same cam and anchor adjusting process from the late 30s up until around 1960. I doubt you will find the procedure in every year of service manual, Mopar figured that they could cover procedures for mechanical changes about the date the changes first occurred, and then maybe print a reminder every 4-5 years afterwards. They must not have seen a need to reprint the same procedure in every manual. Kind of sucks when you don't know the procedure, or what year it changed, but at least there are web sites that can provide the procedure for you.

There is a specific process to adjust the brakes, and if you want them to work, you need to find the procedure and follow it. In addition to the adjusting cams, I believe either the top or the bottom anchor post (maybe both) is/are eccentric as well and rotate to adjust the shoe to drum distance. Gene