Rochester Carburetor Tuning Drilling Main Body
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Though the air horn and main body contain provisions for bypass air, the throttle body of this Quadrajet wasn't equipped for it. To add it, we placed a lower main body gasket over the throttle body, used a center punch to mark the location, and used an electric drill to bore a hole through the aluminum throttle body, first to 0.085 for the initial calibration and then 0.100 for the final calibration. View Related Article
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