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carburettor id

  1. Drivetrain & Performance
    Guys , can you help please. Numbers on my carb are 4781-6 which indicates it's an 850 Double Pumper but what what does the 6 indicate? I have been on the Holley web-site and most numbers go up to 4781-5 but I cant find anything indicating 4781-6? Any help would be much appreciated, thanks.