There we go... that's the information I was looking for. I guess I should have known about the hubs, that makes sense with 6-lug vs 8-lug wheels.
I just crawled under mine to look for what is making noise - I really couldn't see anything out of whack. Maybe I won't bother rebuilding, just get it aligned and see if I'm happier with it. It's definitely pulling left and sometimes seems to wander, but I could be a bit hypervigilant, I dunno.
I had some banging under mine after I did the suspension rebuild. It turned out to be the swaybar links I used - which I just couldn't seem to get aligned in such a way as they wouldn't bind up. After screwing with them like 5 times I eventually just gave up and put a set of "standard" type swaybar links in there that were really heavy duty. That solved the problem and they've been fine for like two years now.
The whole " I got under there and started pulling on things to see what was loose" trick - is something that just doesn't work on trucks IMHO. First off you're unlikely to put the kind of forces on a suspension piece with your own physical strength - as compared to what gets put on them by the truck itself, also trying to do it with the truck jacked up (which is what a lot of people do) - is not going to put the suspension in the same place it is when the noise is being produced.