I have a guy who may be interested in buying a set of box sides from my '41 1/2 ton. He has a '38. Are they the same, or are there differences between the years?

I tried checking the 1929-51 Master Parts Manual, but it only states 1941-53 as being the same and it does not show box sides for earlier than 1941, unless the information is in another section. ohwell

Thanks, Jeff

My 1953 Chevrolet
1947.1 Gallery
1972 C-10 1/2 Ton & 1972 C-30 1 Ton