You can wrap a chain around the underside of your floor jack and over the top of the frame. The frame won't go up when you raise the floor jack.

Removing the springs is easy. You can use Berner's method if there is not enough weight on the front end. Disconnect the lower ball joint, support the lower a-arm with the floor jack. You may have to remove the backing plate because the lower part of the spindle, around the ball joint, sticks into a slot in the backing plate. Swing the spindle out of the way and lower the jack, jack stand under frame. Once the a-arm is all the way down give the spring a swift kick :D, or just grab hold of it and pull it out, it's not under tension. I wrestled with a spring compressor on one side then realized you can pop the spring in and out by hand once the a-arm is all the way down.

EDIT: Maybe it's the a-arm that sticks through the backing plate. Anyway if you're replacing all 4 bushings you can disconnect either ball joint to start with or both.

Never used a spring compressor on mine, used a steel rod through the shock mount hole and a couple of blocks of wood under the lower arm

http://s777.photobucket.com/albums/y...Compressor.jpg

http://s777.photobucket.com/albums/y...nRightSide.jpg

http://s777.photobucket.com/albums/y...compressor.jpg

I think we should change it from "Murphy's Law" to:

"Classic Car owners Law"
or in my case
"Chevelle's Law"