How Do I Fix This

Perfectly normal. That's how the car was put together. Crooked. Noe of them is perfect. Not one.

Dang Rusty! What are you doing up at this hour? I agree that we are dealing with late 60's technology and tolerances, but damn that seems like a big difference in clearance from one side to the other.
I guess my car was on the production line on a Friday at about 4:30pm.