Hey,
Thank you for providing the link; I was able to find a great deal of information.
The goal is to keep the car original and only update the wheels to something a bit more visually appealing.
If I can find 4x110 bolt pattern wheels that are 5/6" wide, then there wouldn't be much else to do.
It seems like 185/60 tires in the front and 205/60 in the back would fit without rubbing the fenders.
I've checked a few places that offer blank wheels, but they all start at 15 inches. Unfortunately, no one in my area is willing to make custom versions of smaller wheels.