Take a look at mine on my site listed below. Bought it from a guys who sold 55 thru 57 chevy parts. He said he picked it up at a sale, but didn't know what vehicle it came from. Bought it for $50, adjustable in the middle, attaches to center piece on windshield, and drip rails.Seemed to fit perfect to me!!!
Coach Frank

https://sites.google.com/site/bluejaygarage/home
53 half ton http://s159.photobucket.com/user/sworden73/library/?sort=3&start=all&page=1
72 Nova SS sold
75 Corvette
52 Chevy Styleline Coupe