Quote:
Originally Posted by unruhjonny
Pontiac Quadrajet parts (fuel bowls, air horns ect) used the same castings for their model year - some castings changed based on the date when the part was manufactured,.
All original 1967 & early 1968 Quadrajets had the disc pad with the application number stamped on a color coded aluminum disc.
All Rochester Quadrajets manufactured after moving away from the identifying disc were stamped regardless of application.
I have understood that original fuel bowls differed by application in how they were finished (eg: bleed tubes and hot air bypass);
Also the application (assembled carburetor) was a combination of all the parts which made up the assembly.
EG: 7040263 & 7040264 used the same fuel bowl, but they were finished and assembled differently.
Some replacement fuel bowls were sold with not number, because they fit several applications - others were sold (AFAIK) stamped for their intended application.
I believe that as time went on, replacement parts were not always exactly the same as the original equipment (OE) parts.
I believe that the people who know how to identify the correct parts, but don't give full public disclosure do so in an attempt to prevent re-stamping shenanigans - and I agree with this.
Be aware;
There are unstamped fuel bowls for 68+ Buicks and Oldsmobiles which show up on ePay;
There are sellers (knowingly, or unknowingly) who are incorrectly listing them as being applicable to Pontiacs, and the list price assumes these are Pontiac RA castings - but they are NOT Pontiac castings.
Years ago, my cousin had an authentic unstamped NOS 1968(?) Pontiac Quadrajet fuel bowl.
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Here's a Carter 7262 with what I believe to be a Rochester ID tag (round hole and no 'c' for Carter). Pretty sure all Carters had a square hole..Looks legit otherwise:
https://www.ebay.com/itm/20502475109...1098&recoPos=1
Wish he'd sell me just the tag and keep the carb!
Also, there are many mixed and matched 'Frankencarbs' as Kenth has labeled them.