Dale,

Do a search on visors. I dimly recall that someone posted their experience in mounting a 47-52(?) GM car sunvisor on a split windshield Chevrolet A-D truck. I think they had to drill into the body but they got it to work.

http://losangeles.craigslist.org/lac/pts/491305985.html

Also, check the gallery photos and contact people with a sunvisor?

Good luck,
Tim