Control Arms

Reason I am asking is because a few years ago I put larger tires on my Dart and had to bend the bottom lip at front of the wheel well so that the tire would not rub when turning left. The right side has plenty of clearance in the front, around 2-3 inches from front of tire to lower portion of wheel well. The left side has, if I am lucky, 1 inch of clearance from front of tire to lower portion of wheel well. Have not been able to find out why there is such a difference. No one I have talked to has an answer.
Just searching for answer again. Thoughts please!!