Addco sway bar

You MAY have the wrong lower control arms!
There were 2 designs. The first sway bar design connected out near the lower ball joint. The 1973-76 design connected in a few inches, near the lower bolt for the shock. Its possible that you have a sway bar for 1972 and older cars but have 1973 and later lower control arms. The solution? either change the LCAs or the K member.