The GMC and Chevy Dubl Duti van was what I stumbled across in the surfing area parking lot photo a couple days ago, and thought was a home made rv... thanks Marc!

the van on the far left! Marc stretched first, then set loose his Google Fu! 

"I thought it looked like an old Chevy grille, so googled a couple years of Chevys until I found it was a 1940. Then I looked for 1940 Chevy delivery truck and found the barnfinds article."

He figured it out the hard way! 

http://www.autogallery.org.ru/gchevus.htm