i asked this a while back, and asked about a 4x4 pitman arm...and it doesnt work...we ended up bending my tierod...im body dropped on 20s with i beams if it helps any...my post:
http://www.streetsource.com/forum/topic.aspx?topic_id=89990&Topic_title=Ranger+Pitman+Arm+Question&forum_id=22&forum_title=Ford+Trucks
and i did just as the 1st reply says, heat up the tierod & let the weight of the truck bend the tierod