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From what I've learned on the NCRS forum, these crimped-style pumps have a 2-letter code before the pump number (40482) where the first letter is the month and second letter the year. The months begin in January with A, Feb = B, March = C, etc.; the years are 1966=F, '67=G, '68=H, '69=I, '70=J. For '71, the coding changed to a Julian and year code.
It's hard to tell if your pump is showing II (two-eyes) but if it is that should be September '69.
...I've been following these "fuel pump date threads" for years & years and sometimes wonder if there wasn't another supplier or another way of date coding than what is generally believed. I've seen over the years where many other posters in threads with original fuel pumps also have different date coding than what is supposedly gospel.
...I have an original '68 pump(that I believed anyways)that came off of a very low mileage '68 327/350hp. The number reads in total, 228B40658. I always thought that it was a Feb 22, 1968 date(B for Feb, 8 for 1968). This date preceded the cars build date by a few months and the engine build date by about a month. Just sharing what I've experienced.
Hi Joe,
The 40482 stamp is a 1968 fuel pump used on all tri-power and L88 engines. The last letter should be "H" for 1968.
Per the TIM&JG, page 151, "all 1968 and 1969 pumps have a two-letter code for the month / year".
Your first letter could be "I" or maybe even "J" for the month, which would be either September or October of 1968.
This is a picture of the fuel pump off my 68 L89
I initially just assumed that it was the assembly line original fuel pump but the date code doesn’t seem to jive with the cars build date (April 25 1968)
Maybe I incorrectly assumed only assembly line installed fuel pumps had date codes?
Replacement pumps also were dated. With my LS6, e.g., I received 3 40770 pumps. The original was dated 19K40770. A like-new pump on the car was 44G40770. An NOS one in a 1993-dated box and purchased in April 1994 was stamped 182H40770. All of this FWIW.
I removed my fuel pump this weekend.
it appears to be a Sep 69 pump
l=Sep
l=69
Another mystery. I would have sworn it was original to the car. Not to mention it’s a pretty hard fuel pump to find.
I removed my fuel pump this weekend.
it appears to be a Sep 69 pump
l=Sep
l=69
Another mystery. I would have sworn it was original to the car. Not to mention it’s a pretty hard fuel pump to find.
...I made a past post above on my feelings on this, but it's just my opinion. Yeah, the pump that I took off of a very low mileage '68 that I swore was original too, doesn't seem to work out either on what is "gospel" with it's numbers of 228B40658. I have several of these pumps, this one, a service replacement one and another what I thought was an original assembly line pump. It's amazing when you have 3 or 4 of these sitting in front of you the differences that can be seen in all of them!!!
...I made a past post above on my feelings on this, but it's just my opinion. Yeah, the pump that I took off of a very low mileage '68 that I swore was original too, doesn't seem to work out either on what is "gospel" with it's numbers of 228B40658. I have several of these pumps, this one, a service replacement one and another what I thought was an original assembly line pump. It's amazing when you have 3 or 4 of these sitting in front of you the differences that can be seen in all of them!!!
I agree Paul!
I have another Sep 69 40482 pump that took me forever to find. I had it restored by Fred Ballard
and there are subtle differences in the stamping
...I made a past post above on my feelings on this, but it's just my opinion. Yeah, the pump that I took off of a very low mileage '68 that I swore was original too, doesn't seem to work out either on what is "gospel" with it's numbers of 228B40658. I have several of these pumps, this one, a service replacement one and another what I thought was an original assembly line pump. It's amazing when you have 3 or 4 of these sitting in front of you the differences that can be seen in all of them!!!
I agree Paul!
I have another Sep 69 40482 pump that took me forever to find. I had it restored by Fred Ballard
and there are subtle differences in the stamping
I removed my fuel pump this weekend.
it appears to be a Sep 69 pump
l=Sep
l=69
Another mystery. I would have sworn it was original to the car. Not to mention it’s a pretty hard fuel pump to find.
...I'll have to see if I can photograph mine in a few days when the wife gets home from FL with her phone(sorry, I'm old school and still have a flip phone, LOL). Another tidbit on this pic of your pump, that raised "boss" or "pad" just to the LEFT of the number has a stamped "diamond" and a stamped "heart" that my pump also has, but the other two do not. Would be interesting to note to see if anyone else ever noticed those? One other unique thing I noticed, and I do not recall if it's even in the '68/'69 Judging Manual, but the flash chromed stamped steel valve covers of an L-79(327/350hp)had a stamped "0" slightly tilted on the top flange about 1/2 way in between the top two valve cover bolts. Only ORIGINAL valve covers had this. I even had two GM sets of NOS of these covers(non production line)and they did not have the tilted "0". Every original '68 L-79 that I ever viewed that still retained it's original valve covers had this. JMHO
...I'll have to see if I can photograph mine in a few days when the wife gets home from FL with her phone(sorry, I'm old school and still have a flip phone, LOL). Another tidbit on this pic of your pump, that raised "boss" or "pad" just to the LEFT of the number has a stamped "diamond" and a stamped "heart" that my pump also has, but the other two do not. Would be interesting to note to see if anyone else ever noticed those? One other unique thing I noticed, and I do not recall if it's even in the '68/'69 Judging Manual, but the flash chromed stamped steel valve covers of an L-79(327/350hp)had a stamped "0" slightly tilted on the top flange about 1/2 way in between the top two valve cover bolts. Only ORIGINAL valve covers had this. I even had two GM sets of NOS of these covers(non production line)and they did not have the tilted "0". Every original '68 L-79 that I ever viewed that still retained it's original valve covers had this. JMHO
...just updating if there is any interest. Have three pics of two of my 40658 A/C Delco fuel pumps. One is an obvious newer A/C Delco service replacement pump without the A/C logos. Does not have any kind of dating on the pump that I can see. The other 40658 is the one that came off of a low mileage '68 and has the number of "228B40658". Maybe this was also a replacement pump, but from the late '70's or '80's???
