General Category > Quadrajet Carb Talk and Tips

carb difference

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firedan:
i have two quad jet one is original and to my 78trans am W-72 400 auto with the numbers 17058266 and the other is 17058278 i know both are from 78 cars and automatics but what else is different. thank you

Cliff Ruggles:
Very little difference, same castings, throttle body, airhorn, etc.  Might be a vacuum fitting or two that aren't the same, and slightly different calibration, that would be about it.....Cliff

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