Based on this answer, I have a question. Do you have the LCA attached to the spindle and the spindle attached to the UCA? You just said the UCA Bumper was removed. Now I am not NEARLY the Mopar suspension expert that many members here are, but I have completely rebuilt several A Body front suspensions with no problems. Every time I have reinstalled a torsion bar, I did it with the LCA hanging loose, not attached to anything. That allows you to push down on the LCA just a little further than when hooked up to the spindle and UCA. I have never had a problem. They just slide in. You say that everything is hanging as low as it will go, but if the LCA is hanging by itself, it will go down a bit more. This has been my finding. Then assemble the ball joints, UCA and spindle.