Firstly, I reckon you'd need a press. A biggie press. I've wrecked a few big vices in the past, and still didn't get the job done.

That said though, I'd first totally inspect the bushings first... them big bushings don't often go bad. Check for side to side movement first... the... panhard??.. rod. The one that goes diagonally across the back of the rear. I'd guess that is the most likely go go bad. You also might just take the car to an aligntment shop... they should be able to poke around and find the offending part if there is one, or the alignment issue if everything else looks OK.

If you do find bad bushings, you are probably best to just pull the offending parts, get the new bushings, and take 'em all to an automotive machine shop (or any auto shop). I expect you'd be charged $10-15 per bushing to press the old ones out, and new ones in.

Even if you buy a press, there are still lots of things that can go wrong... and unless you need a press often, it aint' worth the expenditure.

Good luck with it!