Solid wheel covers two areas.
For non-streamliners the spoke area must be ventilated.
The other area is aluminum as a traction material. I believe that is what you are planning on running.
On a conventional wheel/tire combo even with a custom fabricated wheel you would be clear to run unless there is something glaring at the inspectors that is unsafe by looking at it. I doubt that any testing would be required.
A solid wheel has two issues of concern to the inspectors. Sharp edges cut into the racing surface. The other is directional control. You have to convince them that your solid wheel will function as well as a wheel/tire combo. Just my thoughts.
I would contact Jack Costella for his views.