Looks like a 235 to me Joker. I went to e-bay and typed in chevy 235 and there were several pictures of 235s and some 216s by mistake. Your truck should have a 216 if original, if not maybe a 235.

1941 Chevy
"First rebuild - complete!"
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1941 GMC resting peacefully
1946/1947 Chevy Street rod on s10 frame complete
1945 GMC panel truck in line for restoration
1941 Plymouth stock complete
1941 GMC COE in restoration process
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1941 Chevy Coe uncertain future resting now