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While this works fine with a turbo, it's not so straight forward with a supercharger. So long as the inlet of the blower is open, the blower will make full boost. So when you close the throttle on the carb, the blower will presurise the inlet, blow the seals in the carb, and pop off the intercooler pipes. you'd need to rig up the clutch (If it had one) to disengage the blower when the throttle blades were closed. (or run a second throttle body on the inlet of the charger, run in sync with the carb throttle.