I'm pretty confident this is something I need to do on a lift. Anyway, have a few questions before I start to order parts... the rear of my SDL is worse than the front

So, I need to do everything there.
Is it possible to do those trailing arm bushings with the subframe attached still or does the entire rear have to come out?
Also, I figure I should do new CV axles? Or Should I just replace the boots (if that can be done)?
Going to do new springs with mounts too as well as toss in a 2.47:1