Carburetor Identification Issue - Pontiac GTO Forum
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post #1 of 5 (permalink) Old 06-28-2012, 06:32 PM Thread Starter
 
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Carburetor Identification Issue

Ive always used Holley so quadrajet is somewhat new to me. Im trying to get the identification numbers right so I can get the right rebuild kit. The problem is seems like half of what I need is not there. It is a reman carb, Ive torn the whole thing apart and the only numbers of any ID of any kind on it read as such

4987s
3507.

No other letters, being what i need following these numbers. Ive tried looking up what it means but every site and book tells me there should be other ID numbers after that. Any ideas? Or would it be better to just replace. Carb needs to be rebuilt BAD.

69 GTO 461 4bbl OHV
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post #2 of 5 (permalink) Old 06-28-2012, 07:50 PM
 
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Here are pics of typical Q-Jet ID number and position.

Red arrow in first pic points to the stamped ID number and date code:



This is the type of ID number you're looking for:



If yours is a re-man, they might have replaced the stamped number with a tag or ???

1968 Pontiac GTO
1983 Pontiac Bonneville (G) wagon
2008 Pontiac G8 base
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post #3 of 5 (permalink) Old 06-28-2012, 07:57 PM Thread Starter
 
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re

Yes thats where mine is as well. But no letters. Just 4 digits parallel to each other
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post #4 of 5 (permalink) Old 06-28-2012, 10:18 PM
 
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17057213 should get ya there. If it is a reman check holley numbers also.

https://www.gtoforum.com/signaturepics/sigpic18842_1.gif

1966 Pontiac Lemans Convertible
389 tri power
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post #5 of 5 (permalink) Old 06-29-2012, 08:38 AM
 
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Quote:
Originally Posted by nuggets View Post
The problem is seems like half of what I need is not there. It is a reman carb, Ive torn the whole thing apart and the only numbers of any ID of any kind on it read as such

4987s
3507.

No other letters, being what i need following these numbers. Ive tried looking up what it means but every site and book tells me there should be other ID numbers after that. Any ideas? Or would it be better to just replace. Carb needs to be rebuilt BAD.

69 GTO 461 4bbl OHV
That's a Carter-built Q-Jet, listed as 1968 - 70 Pontiac application. Unfortunately, Rochester application book does not list the Carter numbers, so you're going to have a tough time getting a "baseline" on that carb. The Carter number is the "4987S" number - that's the carb number, and you can get the correct carb kit using that number. There is no cross reference that I am aware of over to the "correct" Rochester equivalent number, so you're going to have a tough time identifying the correct jetting configuration for the carb.

Lars
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