Yeah, my rear bushings were frozen too. I went to replace the shocks a few years ago and couldn't get the freakin' bolt out! The inner metal chamber had torn away from the rubber and rusted itself solid to the connecting bolt.
You gotta heat it and beat it to get it off. Oh yeah baby.
Gotta press the old out, new in. I just took out the control arms and ran to a local machine shop. 15 min and 5 bucks later good to go.
I gotta do the fronts some time soon. Procrastinating