My wheel alignment shop said that my 1979 300D can't be aligned because the lower control arm bushings are bad and no adjustment is possible. The front tires lean in a the top, but otherwise there are no driveability problems. To replace these, I know that I have to compress the springs with a center-type compressor, but I don't see that I have to remove the control arm from the car to replace the bushing. If a suitable tool were available, can this job be done right on the car? My car (100,000 mi) has the type of arm with only 1 lower bushing per side.