The man wants MORE caster. How about this idea?

Center the rack turn to turn and set the toe to straight ahead. It will need to be done on a machine. It was installed a turn off I bet.
About 1/3 to 1/2 turn out. I have the engine out and want to redo the ugly engine mounts that wdre welded over the Ford serial stamping location. To fix stoopid you sometimes have to go back to beginnings.