I have a visor from a 49-52 Cadillac tha has a cast Zinc conter support. The car visors are narrower as an earlier post had mentioned. I fabbed up some visor mounts to attach it to the rain gutter instead of putting screws through the cab as some have done to make them fit.
Here's a link to all those options (with GM part #s) that Mr.48chevy thinks are stupid.... sorry he referred to these items as "scabs" and "clutter", my bad! I guess at 67 he's just showing that he's just an opinionated old fool that can't see that there's more to life than what he grew up with back in the school yard and the manners to boot. My suggestion would be for him to grow up and/or shut up! You guys are too nice when it comes to a-holes on the forum that, more often than not, try to upset the light-heartedness, comradery and helpfullness we usually find here.
Here you go:
http://53truck.ez15loan.com/howto/accessories01.htm