suspension questions

If i have a 6" diff drop already installed on my truck, what are my options on lifting it. i was thinking about getting some ome 883's and some type of ajustable shock. since the coils give me 3" of lift, can i use the shocks to provide another 1-2"? or is my only option for additional lift going to be a 1.5" spacer?

How will all this affect my stock upper control arms, are there any extended spindles out there besides the ones from the fabtech 6" drop bracket kit since those are 600 bucks each?

I'll be doing a good amount of wheeling so i want the spindles/ucas to be pretty strong...