lower control arm bushing problems

I took the dart out for the first time this year. after i got back home noticed the left front was sitting low. I jacked the car and at first glance everything looked ok. Tightened the torsion bar up a little to rase the car. than noticed the bushings were hamburger. What else should i look for while i'm replacing the bushings? can the bushing cause the car to sag on one side?
oh and these bushings have less than 5000 miles and got them from napa.