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Old 07-16-2018, 11:56 AM   #10
YoungPup1977
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Join Date: Jun 2015
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Re: How can i tell exactly where my engine came from

No. It depends on the suffix found on the deck of the block. The 406 casting was a one year only casting of 1967. Most of these blocks were cast in the later months of 66 and first 6 months of 67 than GM went to the 323 casting.
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