I just ordered a Belltech 2/2 drop kit for my 03 ECSB 4x4. Front spindles, shocks, rear shackles, and shocks (kit 678SP)

Ive read through the install instructions and have a pretty good idea of whats going on and how its all done.

Im wondering if there is anything I should plan on breaking, needing extra of, or needing to replace during the install? Looking at the directions Im not sure if the kit comes the U bolt spacers to remove the blocks on the rear axle or not, and if not - whats the best route to go about this? Also - is there anything else I can do during this process to get a little lower (ie the rear block, letting torsion bars all the way out, etc)?

Thanks in advance,

Ryan