1978 Ford 500 • V8 2WD Automatic • 63,400 miles

I have a 78 ford ltd and I hit a ditch, got an alignment done and my car still wanta to wander when turning or gooing over bumps at 30 mph and above. Its almost like im oversteering when I turn a little bit it wants to keep turning. I looked underneath and nothing looks bent or broke, do you have any suggestions what might be wrong?
January 27, 2011.

Was everything checked as far as tie rods, ball joints, pitman arm? Make sure everything is tight.