How long did you put heat to it?, with a torch it takes a while, eventually the rubber will melt/catch fire, and you can push the bushing out(sometimes they will fall out on its own). A small hand held propane torch($15 at Kmart) is usually all it takes.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed