I made new shims yesterday.
The shims fit just fine. The fork is mostly on but the steering stem still needs to be shortened.
There is not a real axle in this photo, but enough to allow me to start taking measurements. For those who are curious, there is about 8 inches between the fork sliders. A rear tire would fit, but the mounting points for the fender would need to be shortened or removed. They are about 9" from the axle which puts them at the widest part of the rear tire.
The tire in the photo is a 4.00 wide tire.