It was just another possible scenario. But we must remember, we are all human and mistakes are/were made.
I recently saw a '69 Camaro 396 block in which the 3rd number was a 5 and it should have been a 6. It was confirmed with a email from Kurt Sonen as he new of a block that had the same problem and both VIN's were very close.
Kurt
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1969 SS396 Post Sedan Delivered to Van-T Topeka KS
MCACN Day2 Concourse Gold Award
1968 Schwinn Orange Krate Original Paint
1970 Schwinn 3-Speed Deluxe Original Paint