For the last 2 weeks I've been hopped up on Sudafed and other cold remedies so things are a little fuzzy these days. For instance, over Mexican food last night we had an in depth conversation with Johns wife about how red chickens would make good pets. I dunno?

If the summary below is a little confusing blame the drugs!
After last weekend we noticed the rear spring and shackle setup were tweaked to the passenger's side about 1.5 inches. The shackles actually leaned \\ \\ in that direction as you looked at it from the rear.
At first we thought maybe we had mounted the front perches a little out of square thus exaggerating the error at the rear spring bolt. We lowered the truck down until the axle was supported by jack stands then cut loose the tack welds on the front hangers. We then plumb-bobbed and massaged the axle back into square leaving the perches loose and tightened the rear shackles. We raised the truck back up and saw the axle pull to the passenger's side, damn, perches not the problem.
We lowered the truck back down onto the jacks stands and John grabbed a ratchet strap so we could pull the axle back into place. To do this we had to weave the strap around the brake line and the proportioning valve cable which were still connected to the axle. (For those who don't know the PV is mounted near the passenger wheel well under the bed and has +/-3/16th rigid cable that goes from the PV down to the drivers side of the diff, this end is fastened with a bracket and 2 12MM bolts.) I'd looked at this cable before and it appeared to be fairly limp so I wasn't concerned about it. While weaving the strap around the cable John grabbed it and noticed how tight it was. Since the springs and axle were nearly at full droop we summized the cable must be pulling the axle to the passenger's side and causing the problem.

We pulled the 2 12mm bolts and disconnected the cable from the axle. Bam, everything went back to normal.
Since most of our work up to now had been with the axle on stands and the truck on the lift we had never really looked at everything at full droop and tightened up. Apparently when the truck was off the ground the cable would pull the axle, then we would drop the truck onto the ground and the axle would not go back into place.
We did manage to get the tie rod installed and unbolted the steering box. Using a plasthma cutter we cut away enough room to allow the box to move forward and clear the drag link but this will be next weekend's first job.