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Mopar Six Pack Intake Tune Factory Metering Plate

The factory presets the idle screws on the outboard carburetors and then puts a lead plug over them. Pull the plugs and you can adjust them normally. The screws on the front carb are accessible under the fuel bowl so you won't need a Promax throttle plate for the front carb, though one would make it easier to get at the front mixture screws.
Mopar Six-Pack Tuning - Triple Tune

 The factory presets the idle screws on the outboard carburetors and then puts a lead plug over them. Pull the plugs and you can adjust them normally. The screws on the front carb are accessible under the fuel bowl so you won't need a Promax throttle plate for the front carb, though one would make it easier to get at the front mixture screws.  View Related Article

 

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