I needed to lower the swaybar, it was hitting the diff cover. I bought longer end links and cut/drilled some flat stock to shim the swaybar mounts down. I used flat stock to shim a little at a time because I didn't know how far to go. If I were to do it again, I'd get some 3/4" box steel to make the job easier.
I ran the stock driveshaft for a while before switching to a chromoly. From what I remember, the 12-bolt needs a slightly longer or shorter driveshaft (can't remember which), but the stock one will work.
It comes un-painted, I blasted mine with cans of krylon primer and flat black from home depot.
If you know how to check a gear pattern, you may want to pop the cover and check it before you install. Mine was set up good from strange so you can probably skip ths step if you want.