It won't take much to separate the body and frame enough to slip out the bushings. We found a jack with the pad removed and a section of 2x6 worked just fine. If your car has a shiny paint job, then you'll want to pad the wood with some soft rags. Also, jack up the body very slowly and keep an eye on anything that runs from the frame to the body like fuel and brake lines. If they are binding, you will have to unhook one side of the lines for this job.