In one of the threads on this forum, someone indicated that even though the date code on the 7029207 q-jet ends in "9," that does not necessarily mean that the carb was built in '69. There was a mention of "a pad on center body to mount an idle stop solenoid" that exists on more recent q-jets.

Assuming this is true, if you are looking at a picture of the carb, where exactly should you look?

 

The year code "29" indicates 1969 and the "07" is Chev, manual trans.

The numbers are stamped on the drivers side of the float bowl on my carb.

 

All 7029207 carbs look like this:



They all have the accessory mounting pad and hole on the front driver's side.

Lars

 

Are you talking about the "29" and the "07" in the 7029207? If so, I'm not talking about those numbers. I'm talking about the four digit number beside or below the "7029207" number that represents the date assigned to the carb. For example, I talked with someone about a "7029207" q-jet with a date code of "3264." From what I understand, this carb could not have been built in 1969. It could have been built on the 264th day of 1974, or later.

However, I've also seen a carb coded with "2619." Again, from what I've learned, this carb could have been built on the 261st day of 1969, or the 261st day of 1979, or the 261st day of 1989, or maybe in 1999.

If what I've written above is correct, my question is this: What else do you look at to determine, for sure, that the 7029207 carb with "2619" was actually built in 1969?

 

Look here for more info on year dates and carb usage.
http://www.corvettefaq.com/c3/QJetTuningPaper.doc

 

I can tell you that part number 7029207, was used in the sevice replacement world well into the 90's. I wasn't aware of any difference that would make a 261st day built car with a "9" any different for 69-79-89. Don't think they were made in 99

 

Well, I don't think I'm over thinking it. I'm simply saying that, from what I have learned from old threads on this forum and other places, there are 7029207 q-jets made after 1969 as service replacement parts. And I was simply trying to determine how to identify the 7029207 carburetors made after 1969. If you are saying that there were no 7029207 q-jets made after 1969, let me know.

In one of the old threads on this forum, someone mentioned the pads as a way to tell the difference between the original '69 q-jets and the 7029207 replacements made later. This is the only reason I mentioned them.

You may be right that the date codes can't be believed. Okay. What do you look for if you want to tell the difference between a 7029207 carb made in '69 and ones made later as service replacements?

Again, my basic question is still this:How do you tell the difference between 7029207 original carbs and 7029207 carbs made after 1969?

 

Bucket you still intrested in my 7029207? just haven't heard back from u, let me know.

 

I wanted to make sure I was able to answer some questions before I got back to you. I will get back to you with a pm.

 

[QUOTE=bucket;1565499337]Well, I don't think I'm over thinking it. I'm simply saying that, from what I have learned from old threads on this forum and other places, there are 7029207 q-jets made after 1969 as service replacement parts. And I was simply trying to determine how to identify the 7029207 carburetors made after 1969. If you are saying that there were no 7029207 q-jets made after 1969, let me know.
QUOTE]


The 7029207 number appeared on the carb well into the 90's. (think I said that before).

With that said, the service replacement number when ordered could have had the 17 prefix as mentioned. I has a 207 in the box with one of those 17 prefix numbers, and the carb was a 7029207 stamped. (may have had a 83 date code) So,you still got a carb with a 7029207 on it with a date code from 1969 thru --some point in the 1990's. (I don't believe it was still made in 1999 with the 207 stamping.

And to respond to what really matters to you, I don't believe there is/was any casting differences.

 

[QUOTE=dennis;1565503897]Please tell me what the format for the "83 date code" was or what it might have been. I'm assuming it was a four digit number stamped on the carburetor.

 

[QUOTE=bucket;1565506146]
It was julian as you stated. 4 digits first 3 for the day(001-365). Last digit for the year. (0-9)

 

[QUOTE=dennis;1565510309]Great. So, here is the question I've been trying to get on top of: If a q-jet "7029207" carburetor has a four digit date code ending in "9," how do you determine, for sure, that the carburetor was built in 1969 and not, say, 1979 or 1989, since "7029207" carbs were built in 1979 and 1989?

Let's say the code is "0209" for a "7029207" carb. That code could indicate that the carburetor was built on or about the 20th day of 1969. However, could the code indicate that the carburetor was built on or about the 20th day of 1979 or the 20th day of 1989?

I'm trying to determine what's on the later "7029207" carbs that distinguishes them from the original 1969 "7029207" carbs.

 

[QUOTE=bucket;1565511098]Like I said, I,(personally), do not know of any difference or way of determining a difference in "APPEARANCE" over the years. Not to say there couldn't be.

 

[QUOTE=dennis;1565511421]I understand and appreciate your response.

 

Im in search of a 7029215 carb for my 427 build, could some explain the pad thing ? the 215 doesn't have it, that Lars posted

 

You know this post from 2008?
Here is photo of a 215 056 day of 1969.

 

yes I do, so the pad is just the area where the part # and date are stamped ?

 

Yes bur there are other numbers stamped may other areas. Like the base of the Carb in this photo. I am not sure what these numbers indicate.

 

Ive seem some like that and they were the date code, but the doesn't appear to be the case here, the correct carb for mine is the 215 but Im not the guy to pay 1600 bucks....