I had to adjust the torsion bars on my 73 Duster, it was leaning to left in the front. But that was with and without anyone in it. I am new to the A body myself. Hopefully someone with more experience will chime in.
I went to my fathers house today to take a better look at the seats. It maybe these that I'm thinking of.
http://www.classicindustries.com/product/mopar/a-body-duster/parts/md475012.html