[hewittca]

I second what theastronaut says. When I rebuilt the upper arms on my '72 with new cross shafts, they were a bit tricky to get the threads to line up but once you get it right they rotate perfectly and with virtually no squish since they are steel. Drill a new locating hole in the lower shaft for more caster. Most go 3/4" forward on the lower arm, but when I did that my spring was rubbing the crossmember. I went to 3/8" forward and added power steering and that was the magic combo for me. That coupled with all new tierods and balljoints and it drives quite well. I also have 4 nub 5x5 wheels so they clear the calipers without spacers.