Yes, the hubs and drums look very much like the ones on my '64 and '71 D100s.

I'd suggest you make a phone call to this place and ask them every question you can think of:
http://robertsmotorparts.com/store/
or these guys:
https://www.kanter.com/ecatalog/00025.html

I probably mentioned them before but they seem to have a lock on most of the parts.

I don't think those three little nubs on the drums are anything to worry about.

R.