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From "GMan's" post in tech tips on the front lowering:
Front:
1. Make sure the car
is in gear to prevent it from rolling.
2. Raise the car with
the jack positioned in the center of the front cross member.
3. Place the two jack
stands under the cross member, and SLOWLY lower the car onto them.
4. Remove the front
wheels. It may be necessary to slightly loosen the lug nuts before the
wheels are completely off the ground.
5. Find the front
leaf spring, and with a 10mm wrench or socket, turn the bolt as if you
were loosening it (It is reverse threaded so you are actually tightening
it).
6. Turn the bolt until
there is no longer a gap between the bushing and the bolt. Measure the
exposed threads to insure the other side is done the same.
7. Put the wheels
back on and lower the car. NOTE- It may be necessary to place a board
under the tires so you will be able to remove the floor jack once the
car is lowered.