Jethro,

See the screenshot below taken from the 1940 Chevy Car and Truck data PDF.

The "I" appears to be a letter, but was used as the "number 1" in serial number stampings. wink
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Last edited by Gdads51; 10/22/2023 2:06 PM.
~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)