There is a potential for the draglink or pitman hitting the leafpack on compression...but that can be avoided by using a straight pitman arm and proper positioning of the box. I just did one for a buddy last weekend and I'll post some pics here soon.
As you reminded me, Stace, it was a royal PITA drilling those 2 one inch holes through the frame....I actually chose to torch those 2 holes and it was still a pain. Welding out of position was no joy either <img src="/forums/images/graemlins/zombie.gif" alt="" />

PS---the owner of the truck is amazed at the improvement in steering....it steers easier and much less steering slop. Less bump steer also. He noticed the nose dive.