I'm definitely looking into recreating those wheel openings. I dig that look. A nice set of Mickey Thompson slicks to fill that wheel opening will look slick.
If you zoom in you can see this tire fills it pretty well, it's quite a bit of work to do the wheel well openings like that but this tire is a 29.5 - 11.5 w 15.
Real dimensions are 30.6 - 13.5 - 15 with almost 16 inches at section width.
The differential is in stock location.