Quadrajet 7040240 MD 0230

Discussion in 'The Venerable Q-Jet' started by tt455, Mar 24, 2019.

  1. tt455

    tt455 T Bone

    Any value in this carb? I don't know much about it, bought it years ago but decided to keep the holley on the car. It has a sticker holley remanufactured on it, has this been re-stamped or no, how can you tell? ty
    qj10.jpg qj4.jpg qj6.jpg qj9.jpg qj1.jpg
     
  2. BYoung

    BYoung Stage me

    1970 455 carb. Not a throwaway by any means. And the stamping appears accurate.
     
  3. Brad Conley

    Brad Conley Super Moderator Staff Member

    Believe it or not, I found one of those today too! I bought and parted a '73 Electra a few years ago and evidently at some time in that car's past, the original carb was replaced with a 240 carb. Mine's real early 1970 production...August 25, 1969. Weird and I had NO idea that's what it was as I had never bothered to look at the numbers before today.
     
  4. Cliff R

    Cliff R Well-Known Member

    That carburetor has been commercially "remanufactured", and Holley was one of the worst companies to ever touch a Q-jet. They are typically PATHETIC so move forward with caution. The companies that remanufacture them mix-match components, generic parts, and generic calibrations.

    At least 50 percent of them will not be rebuildable as they drill out the fuel inlet seat threads and press in some POS double "O" ring deal.

    Most likely the power piston has had the steel post for the APT system cut off of it, and lead plugs driven into the idle bypass holes in the main casting. I don't work on remanufactured carburetors as a general rule, but have had to salvage a few when they had used rare and valuable main castings and folks needed that particular carb number and Julian date........Cliff
     

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