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400 block casting interpretation

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Old Jun 19, 2020 | 05:52 PM
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mtbraun
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400 block casting interpretation

I know this has been rehashed many times but i am having trouble verifying date code. Want to be sure on this block is outside the window of potentially bad Michigan foundry blocks. See attached, but code is D7TEA3B. Below that is 9M11.

Is that Mar 11, 1979?


 
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Old Jun 26, 2020 | 08:32 AM
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mtbraun
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Figured it all out with a little help from the Bump Nation FB page. I didn't realize that the letter "I" was not used in date codes. So the date code above indicates a casting date of December 11, 1979.
 
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