I have a 49-52 Olds Visor on my truck but I had to make some custom brackets to get it on (solid center support is not adjustable). You can see it in my pictures found by clicking on my name "Atomsplitter", select "View Public Profile" and look to ther right of the page for my album.
This is an Chevy Truck Accessory listing and it details the part numbers of OEM & aftermarket visors that fit various years of trucks.
http://53truck.ez15loan.com/howto/accessories02.htm
Just be aware that some of the Visors attach by screwing the visor directly to the roof and some attach to the rain gutters.
Good luck.