Rochester dating code question
Thread Starter
Instructor
Joined: Nov 2013
Posts: 249
Likes: 0
From: Piedmont Missouri
Rochester dating code question
Most of the original Rochester carbs I have seen have a DA after the number. I'm looking at one for my 69, but here is the stamping on it. Why does this look different than other ones I have seen? Thanks for any help.
Mark
Mark
Team Owner
Joined: Sep 2006
Posts: 31,173
Likes: 4,250
From: Westminster Maryland
Hi Mark,
I believe the letters indicate the plant at which the carb was manufactured.
Don't know enough to know why the carb in the picture doesn't have the letters.
Sorry!
Regards,
Alan
I believe the letters indicate the plant at which the carb was manufactured.
Don't know enough to know why the carb in the picture doesn't have the letters.
Sorry!
Regards,
Alan
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Hey Mark,
The 7029207 quadrajet was available as a service replacement for years after 1969. This could be one of these units. The main tell tale (since your date code could be correct for1969, but also correct for 1979) would be to look at the "front" of the carburetor. The front would be where your vacuum advance line connects. If you have a triangular-shaped pad w/ a hole in it on the right hand side, this is a service carburetor.
The 7029207 quadrajet was available as a service replacement for years after 1969. This could be one of these units. The main tell tale (since your date code could be correct for1969, but also correct for 1979) would be to look at the "front" of the carburetor. The front would be where your vacuum advance line connects. If you have a triangular-shaped pad w/ a hole in it on the right hand side, this is a service carburetor.
CF Community Team
Joined: Mar 2007
Posts: 9,297
Likes: 358
From: Delaware
St. Jude Donor '25
Original 69 L46 carburetors were either stamped "29207 DA" or "7029207 DA". Early carbs had no date underneath (stamped on the base) and later ones had the date either next to the part # or underneath of it.
The one you are looking at is definitely a 1979 service replacement. Giveaway in the part number is the added "0". My guess is later year carbs had 8 digit part nubers so they added a "0" (just a guess) to compensate. Also the dots before and after the number.
Most 7029207s on the market are service replacements. Even some with the DA designation are early replacments. What is the build date of your car?
What is the buld date of you car?
The one you are looking at is definitely a 1979 service replacement. Giveaway in the part number is the added "0". My guess is later year carbs had 8 digit part nubers so they added a "0" (just a guess) to compensate. Also the dots before and after the number.
Most 7029207s on the market are service replacements. Even some with the DA designation are early replacments. What is the build date of your car?
What is the buld date of you car?
Team Owner
Joined: Sep 2006
Posts: 31,173
Likes: 4,250
From: Westminster Maryland
Hi MMJ,
I believe carburetors were one of the parts that was built in 'batches', so you may not find just the date you 'think' would be appropriate.
You might find one dated a little closer to your car's production or a couple of months earlier…. but less than 6 months earlier.
Regards,
Alan
I believe carburetors were one of the parts that was built in 'batches', so you may not find just the date you 'think' would be appropriate.
You might find one dated a little closer to your car's production or a couple of months earlier…. but less than 6 months earlier.
Regards,
Alan
CF Community Team
Joined: Mar 2007
Posts: 9,297
Likes: 358
From: Delaware
St. Jude Donor '25
Hi MMJ,
I believe carburetors were one of the parts that was built in 'batches', so you may not find just the date you 'think' would be appropriate.
You might find one dated a little closer to your car's production or a couple of months earlier…. but less than 6 months earlier.
Regards,
Alan
I believe carburetors were one of the parts that was built in 'batches', so you may not find just the date you 'think' would be appropriate.
You might find one dated a little closer to your car's production or a couple of months earlier…. but less than 6 months earlier.
Regards,
Alan
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski