12 Bolt Brake ID Help Needed

[57tailgater]

I have a 12 bolt out of '74 K5 that I am putting into my '57 3100. A long time ago I tore the brakes down to clean things up but in the meantime things have gotten misplaced and I need to get new. I have the drums and they are marked with "GM 333047" and "MAX.DIA.11.24" I see there are two brake sizes listed in most places: 11x2 and 11-5/32x2-3/4. How do I tell what size I need? Where can I get a complete hardware kit that includes the adjusters as well? I am also wanting to get new wheel cylinders too. Thanks for the help!