[66sprint]

I recently received a 1968 intake and carburetor from the family of a friend who passed a few years ago.

They were removed from a restored 68 GTO when he added EFI. The car was sold and these were found in his shop.

The carb was restored and the # is 7028267 WE . The Intake # is 9794234 with date code F148.

I have limited experience with the 68 and newer GTOs so had a few questions.

FIrst, does the Carb # and WE plant code correspond with these being from a 400 HO standard (4 speed) GTO?

Are there any other numbers or codes I should look for on the carb to verify it's original application?

On the intake is there anything unique with it being from a GTO or are all the 4 barrel intakes in 68 the same?

I am trying to decide whether to use it on a 455 6X motor that I may swap into my 68 Firebird, or sell it and keep the Performer and generic Qjet that is on the 455 now.

Being a standard transmission carb is there something that would make it unsuitable for use with an auto transmission?

Thanks in advance for whatever info and advice you may have.

[65 Lamnas]

Originally Posted by 66sprint

I recently received a 1968 intake and carburetor from the family of a friend who passed a few years ago.

They were removed from a restored 68 GTO when he added EFI. The car was sold and these were found in his shop.

The carb was restored and the # is 7028267 WE . The Intake # is 9794234 with date code F148.

I have limited experience with the 68 and newer GTOs so had a few questions.

FIrst, does the Carb # and WE plant code correspond with these being from a 400 HO standard (4 speed) GTO?

Are there any other numbers or codes I should look for on the carb to verify it's original application?

On the intake is there anything unique with it being from a GTO or are all the 4 barrel intakes in 68 the same?

I am trying to decide whether to use it on a 455 6X motor that I may swap into my 68 Firebird, or sell it and keep the Performer and generic Qjet that is on the 455 now.

Being a standard transmission carb is there something that would make it unsuitable for use with an auto transmission?

Thanks in advance for whatever info and advice you may have.

The 7028267 was used on Pontiac A-body and B-body '68 models non RA Hi-Perf engines. So 400 HO and 428 HO engines in those cars with MT. The date code for the carb is on the throttle body in a Julian date format. The "WE" is a pick code....but those two things aren't really that useful if you don't have the car. The carb would've been built 3-8 weeks prior to the build date of the car, and the WE would be on the build sheet for the car. There are no further codes on the carb to determine if it came on a 400HO or 428HO.

You can use the carb on an AT car, it just won't have a specific vacuum modulator port in the float bowl like an AT carb would. The manual transmission carbs are usually jetted a bit differently than the AT carbs. But those 2 things aren't deal breakers for running the carb on an AT car....you'll just have to source modulator vacuum from somewhere else, and maybe re-jet the carb or not....just depends on what your engine wants vs. the way the carb is jetted.

The 67 and 68 Qjet factory intakes are the same for standard and hi performance engines. In '69, the top performance engines had aluminum intakes, which carried thru to '72.

The 65-71 intakes won't fit the 72-later heads (like your 6Xs) "as-is"....unless you do something with the exhaust crossovers in the heads.

[66sprint]

Thanks for the details on the application and the "pick code".

[66sprint]

I forgot about the exhaust crossover mismatch.
I will probably keep the performer on the 455 and sell the 68 manifold and Qjet.

Any ideas on a fair value?

[65 Lamnas]

Originally Posted by 66sprint

I forgot about the exhaust crossover mismatch.
I will probably keep the performer on the 455 and sell the 68 manifold and Qjet.

Any ideas on a fair value?

The intake is nothing special....all the V-8 4-bbl '68 intakes are the same, and they made a bazillion of them. If you happen to find someone looking for the specific date code you have, you'll do a little better.

I'd personally be interested in the carb.....I restore them for people and that's not one I have as a core. But you'd do better on the carb to find someone that actually needs it.

[stoveboltgeek]

Being new here, I waited for some more experienced GTO folks to chime in, but it appears no one has.

Wallace Racing http://www.wallaceracing.com/cgi-bin/intake.cgi lists two 4 barrel manifolds for 1968. I can drag out my Pontiac parts catalog to see if there's a difference in the recommended application.

Jon at https://thecarburetorshop.com/ has stated on some forums that you can use an automatic carb with a manual transmission, but not vice-versa. The logic seems to be differences in the calibration of the idle circuit and transfer slots. Automatics are a little trickier in that manner; when taking off from a stop, you can feather a clutch but you can't feather a torque converter. OTOH, I have seen a few Carter WCFBs that can be used for either one, simply by readjusting the choke (this according to my Carter catalog).

I recently compared Q-Jets for the 1970 400. I think I counted 11 different carbs that were used on that engine, depending on application. I could take a look at my Rochester catalog and see if I can see the difference between a manual and automatic 1968 carb. If the throttle bodies are different, I'd say it won't work correctly. If the bowls are different, I'd say it probably won't work correctly.

Of course, if an automatic uses a throttle valve cable (or rod) to control shift points and your carb doesn't have a hole to accept said cable/rod, then it's obviously not going to work. Not knowing what transmission you have, I wanted to mention that.

[OG68]

There appears to be no visual difference between the two manifolds apart from the casting number and the positioning of the 1-2 cylinder numbers.
The changeover date from the -140 manifold and the -234 appears to be around March 15-16 1968. This is also the time frame of the first casting of the RA II engine.
Coincidence?

The -234 manifold was carried over to the '69 model year.

[65 Lamnas]

Originally Posted by stoveboltgeek

Being new here, I waited for some more experienced GTO folks to chime in, but it appears no one has.

Wallace Racing http://www.wallaceracing.com/cgi-bin/intake.cgi lists two 4 barrel manifolds for 1968. I can drag out my Pontiac parts catalog to see if there's a difference in the recommended application.

Jon at https://thecarburetorshop.com/ has stated on some forums that you can use an automatic carb with a manual transmission, but not vice-versa. The logic seems to be differences in the calibration of the idle circuit and transfer slots. Automatics are a little trickier in that manner; when taking off from a stop, you can feather a clutch but you can't feather a torque converter. OTOH, I have seen a few Carter WCFBs that can be used for either one, simply by readjusting the choke (this according to my Carter catalog).

I recently compared Q-Jets for the 1970 400. I think I counted 11 different carbs that were used on that engine, depending on application. I could take a look at my Rochester catalog and see if I can see the difference between a manual and automatic 1968 carb. If the throttle bodies are different, I'd say it won't work correctly. If the bowls are different, I'd say it probably won't work correctly.

Of course, if an automatic uses a throttle valve cable (or rod) to control shift points and your carb doesn't have a hole to accept said cable/rod, then it's obviously not going to work. Not knowing what transmission you have, I wanted to mention that.

The was a running change to the '68 intakes later in the model year.....the size of the NPT port on the #1 intake runner changed....so whenever that change was made, the casting number changed, and Pontiac carried that same iron intake thru the '69 model year. If you wanted to buy the older '68 "140" intake from the stealership, you couldn't...you got the "234" intake. So technically, I'm wrong when I said "all 1968 intakes are the same."

[Scott Thelander]

also the fitting going to the air cleaner is smaller on the early intake,,,,

[Scott Thelander]

I have interest in the carb for my 68
also vacuum hoses and the valve/switch on pass rear,,,
Scott
206 465 91six5

[66sprint]

Scott
I left you a voice message. The carb and manifold are listed in classifieds. I am flexible on price so let me know if you are interested.

Chris