When I did my lift, I gathered 4 jack stands. 1 for each frame rail and 1 for each side of the axle. I jacked up the rear end, pulled the tires, then lowered it on to the frame rail stands. Once I had the frame supported, I slipped one under each side of the axle to support the axle. Now the axle can't come down too far and the frame is supported. From there the only thing that can move is the spring.
I removed the shocks first, so I didn't over extend them, then dropped the springs. Since you're just doing the plates, you can add 2 more jack stands - front and rear of the spring plates - to keep the springs from dropping too far.
Safety first, second and third.
1996 White ZJ
1987 Maroon YJ (sideways build)
1996 Forest Green XJ
The "sideways" build thread:
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