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Date decoding

Old Jan 17, 2006 | 07:20 AM
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Default Date decoding

Does anybody know how to decode the date codes on the Holley carbs and alternator for a 1967 435hp Corvette. The engine is stamped J 26 6(October 26,1966), the assembly date is TII28JE (Townanda Nov,28), what would be the correct and/or acceptible date ranges for the carbs, alternator, etc. If you could please provide an example.

Also the trim tag is F05 (January 05), so what would be the correct date for the glass? Also what about the convertible top, is their correct dates and/or codes for this as well?

Is there a reference book that states acceptable date ranges for parts installed on cars and engines, etc. Also is their a book that decodes all these dates?

Any other information would be helpful.

Thanks
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Old Jan 17, 2006 | 07:35 AM
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The 1967 NCRS Judging Manual. They just revised it. I got mine in the mail last week. Shemp
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Old Jan 17, 2006 | 07:40 AM
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Originally Posted by Tschim
Is there a reference book that states acceptable date ranges for parts installed on cars and engines, etc. Also is their a book that decodes all these dates?
yes there is. You should go onto the NCRS website and order up the latest edition of the Technical Information Manual & Judging Guide (TIM&JG).
That will give you all the date codes, how to read them, where they are located, acceptable date ranges, etc, etc, etc.

That book,Shop Manual, and the AIM (assembly manual) for your car are probably the three most useful books you can get hold of
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Old Jan 17, 2006 | 12:04 PM
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Originally Posted by Tschim
Does anybody know how to decode the date codes on the Holley carbs and alternator for a 1967 435hp Corvette. The engine is stamped J 26 6(October 26,1966), the assembly date is TII28JE (Townanda Nov,28), what would be the correct and/or acceptible date ranges for the carbs, alternator, etc. If you could please provide an example.

Also the trim tag is F05 (January 05), so what would be the correct date for the glass? Also what about the convertible top, is their correct dates and/or codes for this as well?

Is there a reference book that states acceptable date ranges for parts installed on cars and engines, etc. Also is their a book that decodes all these dates?

Any other information would be helpful.

Thanks
As general guidance, NCRS allows full judging credit for any dated component that's dated within six months prior to the car's final assembly date, although 2-6 weeks is "typical"; glass is the exception - up to 12 months is OK on glass, as it was made in batches.

Every non-orange accessory item on the engine (except the distributor) was installed at St. Louis, so those components are dated back from the car's final assembly date, not from the stamped engine assembly date.

Original production carbs have a 3-digit date code (stamped below the LIST number on the air horn) - year/month/week; service replacements have a 4-digit date code - first three digits are the Julian date, fourth digit is the year.

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