Control Arm Camber Bolts Rusted - Do I have to cut them out?

Hi guys,
My upper control arm camber bolts are rusted in. The nuts snapped off on both sides when I tried to loosen them. I put lubricant on the remaining bolts, heated them up and smacked with a small mallet. I'm guessing the bolt is rusted to the bushing sleeve and its not going to come out. Am I right in my thinking here?
Do I have to cut the upper control arm off to get those bolts cut off thus ruining the upper control arm? Or is there another trick to it?
Your help is appreciated.