I am sure that this has been hashed over in other threads, but are you sure it is a 37? It has the 37 style grille, but the cab body lines etc are later style. I know they mixed things up for the coe trucks. It has the circle on the inner door panels, my T16 has a rectangle or square pattern on them.

I spotted one very similar to this when I was in HS after I got my 37, wish I would have kept up in it's whereabouts as I would like to get one.

Jason

1937 GMC T16 468 BBC th350, 4.10
1941 Dodge COE 5.9 cummins, 9 speed roadranger
1947 Diamond T COE, hercules and 4 spd, all original
1955 Chevy LCF 9.0L IH diesel AT545
1962 Corvair (Elsie)
1967 Jeepster Commando
1968 K10
1970 Chevy C50 box truck