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Old 02-09-2022, 12:14 AM
Big Block Bill Big Block Bill is offline
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Default How do you translate original fuel pump dates?

How can I tell the dates on some used fuel pumps I have? If I remember correctly these two came off original Big Block 1969 & 1970 Chevelle's. Any help would be appreciated.

Bill
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Old 02-09-2022, 03:43 PM
Big Block Bill Big Block Bill is offline
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referencing a search on this site, I believe the 016H to be the 16th day of 1968, but I can't figure out the 249U? I remember them to be off of L-78 engines I had. Any input would be appreciated.

Bill
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Old 02-09-2022, 03:55 PM
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I got this from CRG...Joe


GM in the 60s had a 2 letter code where the first letter was the month A=Jan,B=Feb and so forth and the second letter represented the year, H=68, I=69,J=70

Starting in 71 the Julian date replaced the 2 letter. So 1=jan1st & 365= Dec 31st and all points in between. The Letter after the number, the year, still followed in order of previous, J=70, K=71...N=1974
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Old 02-09-2022, 07:20 PM
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Joe has it. I have an original assembly line 68 350hp fuel pump. I’ll send a photo later tonight if I don’t forget. If you want to see it but what Joe shared is correct.
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Old 02-09-2022, 08:25 PM
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Original Fuel pump from my Oct 68 69 Z/28
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Old 02-10-2022, 02:49 AM
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So U would be 1983?
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Old 02-10-2022, 03:08 PM
Big Block Bill Big Block Bill is offline
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Quote:
Originally Posted by jdv69z View Post
Original Fuel pump from my Oct 68 69 Z/28
Thanks for the picture. Am I reading this correctly as HH40669? (August 1968)

Bill
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Old 02-11-2022, 12:29 AM
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The 1/16" tall (aka Small) lettering are from later replacement pumps. Examples of Vintage Factory pumps have the Larger 1/8" lettering.
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Old 02-11-2022, 01:53 AM
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Default I got this off another website regarding date codes

Hope you can read it.
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Old 02-11-2022, 01:35 PM
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Quote:
Originally Posted by Big Block Bill View Post
Thanks for the picture. Am I reading this correctly as HH40669? (August 1968)

Bill
Yes
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