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Thread: Cylinder Head ID.

  1. #1
    Join Date
    Jul 2016
    Yarnell, A
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    Cylinder Head ID.

    I have 2 sets of heads, one set has AX2 and the other set has A1 or AX1 casting numbers, what is the difference in these heads? Marvin

  2. #2
    Join Date
    Nov 2005
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    What are the casting numbers???? Those numbers mean little or nothing.
    Tom Telesco
    Classic and Muscle Automotive
    12 Cook St.
    Norwalk, CT 06853-1601
    Day Phone 203-324-6045 ET
    NailHead Mini-Starters '53-'66
    Adjustable Roller Tip Rocker Arms - All NailHeads
    Custom forged pistons
    Front & rear neoprene seals
    Many other "Nail" parts
    "If I can't get it, you don't need it!"

  3. #3
    Join Date
    Apr 2004
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    Buick casting numbers are typically 7 digits, sometimes 6, sometimes more.

    you're not going to see the Buick casting number unless you pull the valve cover off.

    Big Block casting numbers are here:

    AX2 and A1 sound like two / three digit engine stamping codes and are actually on the exposed face of the block between the #1 and #3 spark plugs. i don't recognize "AX" as a valid Buick stamping though.

    how many cylinders are these heads for? v6 or v8?
    The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
    Vladimir Lenin

    Government schooling is about "the perfect organization of the hive."
    H.H. Goddard, Human Efficiency (1920)

  4. #4
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    Aug 2001
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    Actually, the Nailhead casting numbers are on the outside of the head on the exhaust side.
    Steve B.

    67 GS 525 Buick Stage IV
    66 GS Convertible
    65 GS HT
    63 Riv
    02 Subaru WRX Turbo
    03 Ford Cobra Convertible (Factory Supercharged)

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