Numbers over engine code? - Pontiac GTO Forum
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post #1 of 2 (permalink) Old 02-14-2017, 05:36 PM Thread Starter
 
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Numbers over engine code?

I am new to this forum due to the fact that I just bought a 69 GTO the engine code is YS, above that are stamped 0171953, what does this number mean?? Thank you all.
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post #2 of 2 (permalink) Old 02-14-2017, 11:30 PM
 
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That is the Engine Unit Number. It was stamped at the engine assembly plant. The numbers increase as the production runs through the model year.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

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