8.8 swap
I have the same Doctor Diff kit and bolted it on as came. Put about 1000 miles on it last year with no issues. I love the way it handled. No squeaks but did have a bit more than 1/4" side to side movement when hard cornering. That was with no sway bar on it and using Hotchkis rear springs. I also put in carbon fiber clutches in my 8.8 when I rebuilt mine. They are around $130, but loved them. I never ran it without the CF clutches so I can't compare.