For the 2" spacers, I just put a set of 2.25" ones on my LJ last night.
For the front shocks, I had to cut the nut holding the shock shaft at the top. Otherwise the shaft would just spin, even with Vise-Grips holding it.
I was replacing the shocks anyhow, so this was no problem.
Also, had to remove the lower control arms and sway bar on each corner to get the axle low enough to get the spacers & springs in.
Once we were done, the rear axle was shifted about 2 or so inches to the passenger side, but once we got it down off the lift and on solid ground, it straightened back out.
All in all it wasn't too tough of a job.
2.25" BB w/32's