first hit all 4 shackle bolts, teh swaybar endlinks, and lower shock mount nuts with wd40, then remove both swaybar endlinks, then the lower shock mounts, lower the spare 3-5" & block both sides of the front tires. Measure from ground to top center of wheel well opening, save measurements. If you are in a hurry, put your jack under the spring hanger on one side, and lift the truck untill the tire is JUST on the ground, the shackle should be pointing right at the spring eye. Measure from ground to top center of wheel well opening, save measurements. This is max droop. Remove both shackle nuts (A 2' breaker bar helps). remove the outside shackle, and reinstall the nuts a few turns. start tapping the nuts with a hammer to shove the shackle out. One of the bushings usually comes with the shackle, that is fine at this point. once the bolts are able to be moved without a hammer, remove the nuts. move the spare out of the way if needed to get the shackle out. reinstall the bushing into the spring / shackle hamger if it came out. install any sleaves that are with the kit. Put a little extra grease into the inside of the sleves/bushings without sleaves & install the top of the new shackle. jack the truck up until the bottom of the new shackle lines up with the spring, and install the bolt. Measure from ground to top center of wheel well opening, save measurements. This is new max droop. Torque both bolts to spec, and lower truck. bounce suspension to make sure everything is ok. take a moment to eyeball truck, and be happy it is getting taller. repete on other side. Measure from ground to top center of wheel well opening & compare to old measurements. Change / reattach rear shocks, and remove / reattach swaybar. Take truck on a test drive, remeasure from ground to top center of wheel well opening, post all measurements, so others can drool over changes.