Thank you all for the lively discussion (and the very helpful photo!)
I'm totally with "Hank's custodian" on the crankout windshield: 1946 was the last year Chevrolet made it operable. When I inherited Rosie, the windshield was sealed closed with seemingly bucket-loads of caulk. I determined then that I wanted it to work again in celebration of it's history. Besides, I think it's a quirky-cool feature on a quirky-cool truck!
I'm not too worried about rain infiltration since I would be disinclined to drive it in those conditions anyway (I already have bed boards that need to be refinished...)
