IMHO, I would opt for the raised steering arm over the dropped pitman arm.
I have used both for a correction with an 8" lift. But if given the choice to only use one, the stock pitman arm won't have as much leverage on the box, and frame as the dropped pitman arm. Our trucks have a reputation for breaking the frame so no sense in tempting the crack gods.
I should note that I ran both the dropped pitman, and the block for the Dana60 on my truck, and never cracked the frame. I also ran 18.5/44-16.5 Gumbo Mudders on 16.5x14 wheels. Did some pretty serious four wheeling with out cracking my frame. But again, I would not temp fate if I didn't need to.