Wild Guess: If GM were still selling over-the-counter Q-jets, they'd be as bad as the Edelbrock carbs. At this point, carburetors are a niche market; all the processes that went into making quality product that could last 50K miles and still pass emissions regulations are long gone.
We've seen exactly the same thing happen with ignition distributors. "New Genuine GM" distributors are made in Korea or Taiwan, not by Delco.
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