Need to know what kind of hubs I can use?

If they’re factory drums it’s 5x4”. The disk/drum cars went 5x4.5” in ‘73 but the drum/drum cars stayed 5x4” all the way til the end of front drums.

What the heck happened to those hubs?! You know the drums are swaged onto the hubs right? As in, to get the drums off you need to remove the outer wheel bearings…