1958 Chevy Apache. I'm wanting to modify a standard (Fultun Adjustable) visor to fit my truck, but as a custom idea, I don't want to use the same ol crap I see on every truck in my year range. Maybe even add some louvers for flavor. I want my additions to at least seem like a factory option. I have a few other ideas in mind for my truck, I also fear doing something "done to death". I guess ultimately my question is, does anyone know the expanded span (inches) of this visor?