The running board pattern then may be the only answer IF we could focus in on that running board. There is a pattern on the image that appears to be because of the digitizing of the photo, if the original photo could be enlarged you could narrow down the year. Best of luck


It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed