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Old 04-28-2014, 12:40 AM   #37
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
Re: 1966 Chevy C-10 New project-need help

Is the hissing a vacuum leak or just the sound of the air entering the carb? Spray some carb cleaner around the base of the carb and see if the idle speeds up. Is that 4th bolt crossthreaded into the manifold? Usually there are studs and nuts for the carb to manifold attachment.
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