[sixty8ragtop]

Any info would be greatly appreciated

[65 Lamnas]

Originally Posted by sixty8ragtop

Any info would be greatly appreciated

7025175 is the center carb for a 1965 389 tripower engine w/manual transmission.
7025178 is the front carb for a 1965 389 tripower engine w/manual transmission.

If they were say, 7025075 and 7025078, they would be correct for a 1965 421 tripower engine w/MT. The 702 tells us the general vintage, the 5 is the year. The 7 is for Pontiac division of GM and an Olds carb here, would be a 5. The last number usually (but not always) gives an indication of manual or auto trans equipped engine that it's on. I've forgotten what that other number (on a 2-barrel) means.

[sixty8ragtop]

Originally Posted by 65 Lamnas

7025175 is the center carb for a 1965 389 tripower engine w/manual transmission.
7025178 is the front carb for a 1965 389 tripower engine w/manual transmission.

If they were say, 7025075 and 7025078, they would be correct for a 1965 421 tripower engine w/MT. The 702 tells us the general vintage, the 5 is the year. The 7 is for Pontiac division of GM and an Olds carb here, would be a 5. The last number usually (but not always) gives an indication of manual or auto trans equipped engine that it's on. I've forgotten what that other number (on a 2-barrel) means.

Thanks for the great info and the rapid response to my inquiry. Do you know the number for the rear carb tag on a 1965 421 TriPower engine w/manual transmission?

[dhcarguy]

7025179 is the rear w/manual trans.

[sixty8ragtop]

Much appreciated!

[Kenth]

M4 is production date, December 1964.

[sixty8ragtop]

Originally Posted by 65 Lamnas

7025175 is the center carb for a 1965 389 tripower engine w/manual transmission.
7025178 is the front carb for a 1965 389 tripower engine w/manual transmission.

If they were say, 7025075 and 7025078, they would be correct for a 1965 421 tripower engine w/MT. The 702 tells us the general vintage, the 5 is the year. The 7 is for Pontiac division of GM and an Olds carb here, would be a 5. The last number usually (but not always) gives an indication of manual or auto trans equipped engine that it's on. I've forgotten what that other number (on a 2-barrel) means.

I purchased a set of “1965 Pontiac GTO Tripower Carburetor Identification Tags, Manual Transmission” from Inline Tube. Nice 389 TriPower w/manual transmission repops.
https://www.inlinetube.com/products/...28595911196733

[Kenth]

M5 on your repro tags is december 1965. Doesn't jive with #7025175.

Just noticed that they have M5 on all Tri-Power tags, 1964, 1965 and 1966!!! M5 is only good for 1966.

[carbking]

The tags were stamped from anodized aluminum, with colors coded to the 7 digit part number of the carburetor:

7025175 was black
7025178 was gold or brass colored
7025179 was burnt orange

The "80" and the "46" were inspector stamps for the individual or group that inspected this run of carburetors.

MOST of the reproduction tags on the market would cause the owner to lose the maximum number of carburetor points, if the car were entered into a points competition.

Kenth pointed out issues with the inline tube tags, and the tags I have seen on ebay are just horrible!

Rather than waste money on "reproduction" tags of dubious quality, make your own. A set of reverse stamps can be purchased, and beer and soda cans come in a variety of colors of anodized aluminum! Reverse stamps are necessary as the tags are stamped from the back so the numbers/letters stand proud of the tag on the front.

EDIT: adding to Kenth's post; the M5 tags would not even be good for 1966 if the vehicle had a build date in November 1965 or earlier.

Jon

[GtoFM]

These are the tags from the 2 engines I have had over 40 yrs. Notice different colors, as mentioned, but different shapes, per year, as well.

Upper right, notice p/n starts with 703. This is an A.I.R. emissions (Cali) carb.

Lower left, notice p/n 7025179 signifies a 1965 application but date code is J6, Oct '66

Lower right, don't know what the original color was.

[60sstuff]

Originally Posted by Kenth

M5 on your repro tags is december 1965. Doesn't jive with #7025175.

Just noticed that they have M5 on all Tri-Power tags, 1964, 1965 and 1966!!! M5 is only good for 1966.

Now that is just plain Silly, but that’s repro for ya.

[60sstuff]

Here are the tags that were on my ‘66 Tri-Power Automatic when I purchased it in 1991.

All correct part numbers for this car.

Not sure why the front tag is dated J6 ?
Center tag M5
Rear tag L5

Data plate for this car is 01B - second week January ‘66.

The vast majority of these OEM tags are missing the Original color from carb cleaner, gasoline, etc.

Collection of OEM tags I’ve collected over the years.

[carbking]

Since 60sstuff brought up the square California tag, a bit more information:

Carter also used a square tag on California AFB carbs.

Rochester Q-Jets made mostly before mid-1968 were also identified by tags. The carbs for Federal cars have a round hole in the center of the tag; the California versions a square hole in the center of the tag. Take a look at the reproduction Q-Jet tags on Ebay for a number of Federal Q-Jets, all with the incorrect color, and the square hole.

Jon

[60sstuff]

Originally Posted by carbking

Since 60sstuff brought up the square California tag, a bit more information:

Jon

Correction - I didn’t bring up a square California tag.
Mine are all triangle.

Chris

[GtoFM]

The sq. tag was on my ctr carb when I bought the car in '71. It's a '64 Lemans, GTO option and the engine had been replaced by the PO with a '65 YF block, '65 716 heads and a '66 tripower.

I do have a similar anomaly as 60sstuff. The 7025179 tags that were on the above car, have J6 (Oct '66) Date Codes. The Mod. # shows them as 1965.

[carbking]

Chris - you are right, and my apology; it was GtoFM with the square tag.

The J5 is not really an anomaly; it is a service replacement carb (note the engineering status is "F"). Someone had carburetor problems after the car was built, and a service carburetor was installed at the dealership. In general, the service tags are kind of a cross between brown and violet in color, instead of the color of the production tag.

I have had a number of these carbs over the years.

In 1968, Rochester was still building some tripower carbs, and the number was stamped on the passenger side of the bowl; like other 1968 and newer 2-barrel Rochesters. There were no tags on these later carburetors.

Jon.

[60sstuff]

Originally Posted by carbking

Chris - you are right, and my apology; it was GtoFM with the square tag.

The J5 is not really an anomaly; it is a service replacement carb (note the engineering status is "F").

Jon.

Hi Jon,
I’m having difficulty following your explanation.
Now you are saying a J5 with the “F” status ??

My front tag shown above is J6.

Help me out here.

[carbking]

Artificial intelligence is supposed to correct my typing errors!

Just replace the 5 with the 6 and chalk this up to my typing expertise!

With two miscues (I can't really chalk up the use of the wrong name to typing, can I?) on this thread, perhaps I should quit now while I am behind!

Jon

[60sstuff]

Hilarious ^^^^. Love your humor.

AI, what will they think of next.

Jon, another question, what does the “F” stand for? Faulty, Funny, Fantastic ??

Thank you for your help !!

Chris

[carbking]

Chris - at the risk of another error...........................

I have seen more AS (Artificial Stupidity) than AI. Some of the artificially stupid answering machines would cause a Baptist minister to curse at a Sunday dinner!

The "F" represents the fact that the carburetor has had 6 minor engineering changes. What were the changes?? If it were a Carter, I could answer that, but I do not have the Rochester drawings.

But as an example, perhaps the center carburetor was lean at idle. Perhaps the idle jets in the center carb were 0.032 inch; and a change to 0.0325 was done. If this were the first change, the status would change from that area of the tag being blank, to an "A". With a second change, perhaps 1 additional inch on the length of the choke spring??, the "A" would be replaced with a "B". The third change, a "C", and so on. Each change is represented by a sequential letter increment.

Jon