Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Adjusting the secondary butterflies on a Holley?
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Old 08-26-2012, 04:57 PM
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I took a small flat blade screwdriver, heated it a bit with a propane torch and bent a 90 in the end.
Then I could reach under and adjust it without removing the carb.
What type of a screw head does yours have?
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