Sorry I have not gotten back on this. My work computer blew up on me.
I did not want to sound like a whiner. I put the drum on and have been driving the wagon. It seems to be fine. I think the pads will rub off the surface rust in the drum.
I really appreciate the parts. The bearings were well greased and the water did not seem to get to that stuff. The wagon is rolling great and stopping fine.