OK sports fans, here goes. I am thinking the 52307 LCA's that I installed are the wrong application for my '70 Duster. QA1 does not list this LCA for the '70. I was thinking that I just upgraded my front brakes to '73 disc so apparently had '73 on my brain when I ordered the LCA's. The hogwash about QA1 using the wrong jig was just that, hogwash. Also, QA1 does not sell an A body K-member for anything newer than a '72, though I read some have successfully installed it. Am going to reinstall my OE LCA's and move on with life. This was an expensive, mentally challenging exercise for me. Guess I will be selling some LCA's in the "for sale" area soon! Thanks to everyone for all the input.
