A couple things to remember. Are you putting on new shackles as well? If so, keep in mind you won't get the full wheel travel unless you get longer length shocks.

Spooky is absolutely correct about measuring the leaves and putting them in the right direction. Painting is also recommended before installing. Just some Rustoleum black works great.

You'll be discarding your load leaf, re-using your existing U-bolts, and replacing the center bolt that holds the spring pack together. This comes extra long and you will need to cut it off with a hacksaw or cutting disc after putting the leaf packs back together.

Pretty simple job, straight forward. For safety make sure you have LARGE jack stands to support the truck at the frame right in front of the leaf spring hanger. You'll also want smaller stands to let the diff sit on.

If your not replacing the shackles, you can split the leaf spring packs in the truck and add the AAL without taking the springs out.