72 4 wheel drive brake rotors

[Mr Chevorlet]

I have changed rotors before on my 72 4 wheel blazer and the rotors slipped. Over the hub. But I have a 72 4 wheel truck now and it looks like I have to pull the hub to change rotors here is a picture. Believe it or not all theses years I have never taken a hub apart on a 4 wheel drive. And to be honest this has always scared me. I am afraid I wont get it back together right. And I am a person that says I can do anything. This is my 5th ground up restoration and I do it all my self. But this I have some kind of mental blockage on 4wheel drive hubs. Sorry for being long winded here is a pic of the hub plus a couple others of the truck. Oh it a 67 body sitting on 72 frame