if the wheel is back and the castor rod is in-tact then the only other thing it could be is bent chassis rail, look between where the engine crossmember bolts up and the castor rod mount, should be dead flat. A give away of this being bent is that the swaybar mount will look mounted on an angle also. It's a problem my rally car has, it's bad enough the swaybar touches the sump at the front of the motor