We had my 73 Duster done a few years back. This was due to another issue we were not aware of at first. Anyways ordered the PST kit w/all Poly parts, thinking in the $500 range then. Well when it was pulled apart found the issue was not worn parts but the sleeve that holds the lower control arm in place. The weld cracked & was letting things go out of alignment. That actually was an easy fix once he found it. But it take a couple tear downs to locate it. When the car was in the air weight was holding that in place, then when lowered oops. Out of alignment again. Anyways he fixed that for a minimal fee. Overall w/my supplying the parts, it was still close the $1,000. Now that included the fix, installing all new bushing (not easy) proper front end alignment.
The car drives like new now, lets hope it stays that way.
Thanks, Ken