Jake, I have done an AAL on my truck also, and it will take a few hours tops. I can help out too.
The new leaf will make the rear end ride stiffer. It re-archs the stock leaf pack because of its stiffness. At least my truck was stiffer.
Anyone have any input on a 2 inch block in the rear instead? Wouldn't be easier to install and wouldn't ride rough. I know people hate blocks, but a 2 inch wouldn't be a big deal