Steering arms can be bent - - - -COLD- - - - -never use heat on steering linkage- - - -to correct minor out of level errors. Re-arching springs also comes to mind if the drag link is angled up toward the front. Decades of bouncing around on less-than smooth roads will make springs sag and have a definite effect on steering geometry. On vehicles that have been slightly lowered, not to the ridiculous front bumper-dragging point, raising the steering gear on the frame is about the only option. At some point, the vehicle becomes a trailer queen that gets carefully rolled out for a car show, with no safe way to be operated on the street, but the guys who do those kinds of mods know they're unsafe, regardless of their protests to the contrary.
Jerry