Inlet thread size

Discussion in 'The Venerable Q-Jet' started by Storm1, May 4, 2024.

  1. Storm1

    Storm1 Silver Level contributor

    Anyone know the inlet thread size for stock 71 GS 4bbl qjet? 7041544

    The thread in the carb that the filter screws into, not the line into the filter.
     
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    There are two different fittings depending on the year of the carburetor.

    https://quadrajetparts.com/inlet-fitting-long-p-136.html


    https://quadrajetparts.com/long-inlet-fitting-p-436.html?osCsid=70bdf67d391bbe6f68d9b5c811e1026f (72 and later)

    The early 7/8" fittings use a gasket to seal. The later 1" uses an internal seal that goes onto the end of the fitting. They seal much better.
     
    Last edited: May 5, 2024
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  3. techg8

    techg8 The BS GS

    7/8-20 for 1971 buick
     
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  4. Storm1

    Storm1 Silver Level contributor

    Thanks guys!
     

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