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Technical Adapting an Olds log intake to a 331 Cadillac?

Discussion in 'The Hokey Ass Message Board' started by Mike Paul, Feb 11, 2018.

  1. Mike Paul
    Joined: Oct 10, 2003
    Posts: 930

    Mike Paul

    I’ve heard it can be done, what’s all involved? Thanks
  2. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 4,620


    I assume you're talking about an Olds V8, but which one? 215, 260, 303, 307, 324, 330, 350, 371, 394, 400, 403, 425, 455, etc.......
  3. Dave Mc
    Joined: Mar 8, 2011
    Posts: 1,793

    Dave Mc

    IMG_0840.JPG I was told by a Cadillac Expert 59 -62 Cad 390 manifold will bolt up to 331 , not sure if Olds of those years will, I was asking because I was thinking about updating from Rochester Quadrajet to Edelbrock , AV2 the Edelbrock won't bolt up to the 331 without a hokey ass adapter, but if you change to later carb the stock Cad air cleaner will not fit without modifications,nothins ez
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  4. falconsprint63
    Joined: May 17, 2007
    Posts: 2,348

    from Mayberry

    I wouldn't waste my time. They share a bell housing pattern and flywheel but that's about it. Any 62 or earlier 365 or 390 intake will bolt on and you can make a Studebaker intake work in a pinch.

    To adapt it you'll basically have to replace the mounting flange. If you're going to that effort just build it from scratch. Imo

    Sent from my SM-G950U using The H.A.M.B. mobile app
  5. You could probably use a manifold from as early as 57 since that's when the AFB came into use.
    What year 331 are we talking about? They were running 2bbl carbs 49-51 and weren't very high compression.. You could be overcarbing it.
    Last edited: Feb 24, 2018
  6. sunbeam
    Joined: Oct 22, 2010
    Posts: 4,144


    He's asking about a log manifold
  7. Mike Paul
    Joined: Oct 10, 2003
    Posts: 930

    Mike Paul

    I have a 1950 331, so I’m mainly wondering about early 50’s Olds engines and how to make a 6x2 log manifold work on my 331 Cadillac

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