I was going to like your post, but the fact that your parts are delayed sucks.
Do you think you have enough clearance around the radius to run a 14” rotor in your wheel? In theory, only about .2” closer to the barrel of the wheel?
I think it would fit but would require a thicker wheel spacer. The problem with my wheels is they aren’t designed for modern cars, they are made for muscle cars. Therefore, the spokes start to curve back instead of staying out toward the face of the wheel. It would be perfectly fine with a rotor/caliper combo that was offset further from the face of the hub. There’s plenty of room to the ID of the wheel. I’m sure a wheel designed for a mustang would work just fine.