The BDS kit did come with absolutely everything I needed for the lift minus the SYE kit obviously. When I customized the kit it came with the boomerang shackles and steering stabilizer options as well. New kit went in extremely easy. Even came with steel braided brake lines. Old kit was a pain though, especially getting the old bolts out of the top of the rear shackles. They were really seized in there, so much so that we had to engineer a series of wedges and make a pickle fork or sorts to pull them out. If its an option for you, I would personally recommend greaseable bolts for the shackles.
Just looked at your build thread. Amazing work! You've got way more skills than I do, so I may need to recruit some help.