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Technical 8BA flathead sleeve source

Discussion in 'The Hokey Ass Message Board' started by rat bastad, Apr 16, 2026 at 12:41 AM.

  1. Engine guys, I'm needing to source a sleeve for an 8BA that's at 3 5/16" +.030 or 3.342" as I can't source one locally. It will need a bit of custom work at the top for locating purposes in the block. I have all the necessary dimensions/drawing.

    What's the best source Stateside for a custom sleeve for a flathead ?

    Thanks !
     
  2. Flathead Dave
    Joined: Mar 21, 2014
    Posts: 4,059

    Flathead Dave
    ALLIANCE MEMBER
    from So. Cal.

    Try H&H Flatheads in SoCal. I don't know if they can customize a sleeve but it's worth a try.
     
  3. FrozenMerc
    Joined: Sep 4, 2009
    Posts: 3,489

    FrozenMerc
    Member

    You may have to get your hands on the Mahle (Clevite) or Melling catalog and search by dimensions. Hopefully something close to what you need is available.

    [​IMG]

    Melling Part Numbers CSL107, 207, and 508 all are 3.3125" bore, with various lengths and wall thicknesses. Jeg's has those 3 part numbers in stock for ~$32 each. Hopefully there is enough meat there that you can modify one for your needs.
     
    Last edited: Apr 16, 2026 at 10:20 AM
  4. Thanx Chief I'll check it out,
     

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