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**4x41971SWB** · 09-19-2018, 01:29 AM

The second to the last number if it is 0, 1, or 2 that means it was for a Chevrolet. The two letters are production code. The next set of four numbers are the production day and year. Mine for example is 3281 which means it was built on the 328nd day of the year 1971.

09-19-2018, 01:29 AM	#4
4x41971SWB Registered User Join Date: May 2016 Location: Escondido CA Posts: 571	Re: Carb Help!!` The second to the last number if it is 0, 1, or 2 that means it was for a Chevrolet. The two letters are production code. The next set of four numbers are the production day and year. Mine for example is 3281 which means it was built on the 328nd day of the year 1971.