I have seen very few build sheets that include the Engine Unit Number on the form. There is a box for this information, but the number is not usually printed.
The VIN was stamped on the blocks begining with the 1968 model year, which started in late August of 1967. There has always been some confusion concerning the 1967 or 1968 stamping. It was both; late '67 calendar year which included the 1968 model year.
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