Hey, is that an insult directed at Bob? Ok, just kidding. I don't know what it's off of, but here's a bump for you.
the shape of the top of the dash and crank hole and the hole in the glove box i am thinking 36-7 gm[ but not chevy]
The way it mounts on the sides look a lot like a 36 Chevy truck I used to have but the rest of it looks different so my guess is a GM truck mid 30s. 100% uncertain.