Well the U-joints fixed the klunk. Thanks for the help. The differential support bushing looked new so I didn't change that.

 

Well, I tried. [&o]

Glad ya found the prob.
Generally it's the higher mileage, or long term inattention (parking 'er in a feild ), that causes the center bushing to fail. Ya might change u-joints twice in the life of the bushing.Anytime ya have 'er in the air, check it all out.

 

Squeaking sounds more like something gone horribly wrong [] in the parking brake stuff. That's a lot easier to fix than rear wheel bearings.