Harold,
The only information on sun visors I can find are listed here,

bracket

bracket and pad Pad is 6"X 15.25"

http://www.46chevytruck.com/1946%20Chevrolet%20Truck%20Data%20Book%20For%20Chevrolet%20Salesman.pdf
Hope the above helps.
Also check with Sheridan as he may have more information.
Warner

Last edited by cletis; 01/26/2014 7:38 PM. Reason: repaired link