What the date code is?

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oldpunko77

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#18398 date code ? 1970 340 A body non ac manual.

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What is it on?

That might be a manufacturer code.


Day 18398 is Sunday, December 11, 2011 per 10,000 calendar
 
Probably a plant or vendor code. It shows up on all manner of Mopar radiators of the period. It's on mine.

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Part number #2998945


According to the Chrysler chart, 2998945 is a radiator part number for 1970 Dart/Valiant, 22", 318 w/o AC or 340 w/ AC.

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As said above, 18398 is probably the manufacturer code.
In 1971, this code is 20446. At least, it’s the code of my 71 radiator.

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Vendor number
Rad dates are 4 stamped digits in the pass on side bracket, three digit for the day and one for year.
 
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