I thought I would post a picture of the interesting filler neck for a 39/40 GMC truck. For those that don't know, a 39/40 Chevy radiator will not drop in. This truck is owned by the gentleman that I got my extra doghouse from earlier this week. Date code shows July 1940. Part number is 3112890.
P. S. If anyone has one of these laying around, I need it.