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    1. #2
      Join Date
      Jul 2009
      Location
      CT/RI Line
      Posts
      23
      That valve should close at 0 vacuum.The vacuum line to the blow valve should be taken under the carb.I connected my blow valve and boost gauge from under the carb and boost retard and boost regulator from the carb hat.You will not make vacuum without a load on the motor.

      69 Chevelle



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