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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#27942 09/03/2003 2:54 AM | Joined: Apr 2002 Posts: 13 Junior Member | | Junior Member Joined: Apr 2002 Posts: 13 | I own a 54 GMC truck and have had nothing but trouble with my Zenith downdraft carbs. Keep flooding out, run great and then flood out all of a sudden. I have taken them back to the carb shop twice and still the same result. I was told to dump the carb and purchase a Holley 390 CFM carb and new 4 barrel mainfold from Patricks. I was also told that the correct carb is the Holley 8007. Has anyone tried this and will it eliminate my troubles or cause me a whole new set of problems??? I have heard that the 4 barrels flood out too. Confused
My enigne is a 248 with the head casting # 2194819.
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