[BIG BLOCK JIMMY]

Great info from everyone, thank you. I believe my issue may be beyond what the gadget on the YouTube video can correct, but I'm glad to know it's out there for potential future use.
I just double checked the ball joints and everything is tight.
I think I just scored a professional shop and all they do is axle and drive shafts. Two co-workers have had insane custom work done to their jeeps there with great results. They're currently working on two '72 Scouts and a C10, so they're not only Jeep guys.
It's going to take a couple weeks to get it in, but I'm starting to feel confident that all will be well very soon!
I will report back in a few weeks as soon as I info to share.