I got a 47 chevy, I think, but need help.

[The Big Green]

I will post pics, but here's the deal, its my uncles and has been parked for 20 to 25 years in a feild. He bought it from his uncle for a $100 and it had good blue paint and a good running straight 6. The truck has set because of a bad starter, he bought a different truck and parked this one. It was given to me for free just because he doesn't want it to sit any longer. He is a farmer and it was used to haul square bales. He thinks it was a 47 but I could use some help to really know how to tell.