Well, I like to live life on the edge.. I drove it home this past weekend. I hear COVID is going to kill me anyway

Got started cleaning out the years of mouse colonies, etc. Started a build thread. It's definitely going to be some work, but having gotten my hands a bit dirty with it, I don't think it's going to be all that bad. While rusty, most fasteners I've tested still move freely. I kind of dread pulling the drums, but we'll cross that bridge when we get to it.
Can anyone tell me if these wheels are one piece or not? I can't find a split or retaining ring or anything in them anywhere. Even though they appear to be one piece to me, I took proper safety precautions and wrapped chain around them and filled from several feet away just in case.