Thread: Holley carburetor has No manifold Vacuum inlet ports! What to do
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Old 05-17-2026, 03:18 PM
SRGN SRGN is offline
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Join Date: Jun 2009
Location: Central NJ
Posts: 167
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Some Holley base plates have the bosses for vacuum fittings machined but not drilled. Look at the base of the carb, you may need to drill/tap and add screw in fittings.

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