The Alignment on my Crew Cab has a very "neutral" feel to it (i.e. not much forward directional stability). I think this could be due to not enough positive caster on my Dana 60. Some of the positive caster was probably lost when the 4" lift was installed. I have heard that there are wedges that can correct this, but wouldn't this increase the front drive shaft operating angle? Also, I had a chance to drive directly behind my Crew Cab one time while my wife was driving it, and I noticed the truck had a slight amount of "dog legging". This would indicate that the rear axle of my truck is a little out of alignment. I have looked very closely at the rear axle, and it shows no sign what so ever of shifting out of place. I think the reason for the rear axle mis-alignment is from the cheap cast iron lift block saddle pins not lining the rear axle up properly. Any thoughts or information on this...?