There are plenty of install instructions using the Search feature. I found this quote by Maniak very quickly with a search.
"Install is easy.. It takes longer to lift the truck and take the tire off than it does to do the install. Install (once the truck is on jack stands (support the frame.. not the suspension) just take off the big nut (I think its 1 1/8th) twist out the spring.. put in the spacer, put the spring back in and bolt it down.
If you still have your front sway bars you may have to remove 1 bolt from the sway bar to allow the suspension to droop enough to put it in.. but its not hard."
btw: shankomatic76, I am deleting your other post. Please don't double post.