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Hot Rods Oldsmobile Rocket engine identification

Discussion in 'The Hokey Ass Message Board' started by calislabi, Jun 30, 2020.

  1. calislabi
    Joined: May 21, 2020
    Posts: 8

    calislabi

    Hi
    I have an early oldsmobile rocket engine. I'm trying to find out what kind of rocker engine I have
    ( year, cu. inch..........) can somebody help me? Please see picture with the engine number.

    Thanks for your answers

    Patrick

    VIN NO. Rocket Engine.jpg
     
  2. belair
    Joined: Jul 10, 2006
    Posts: 8,458

    belair
    Member

    55 heads had an 8 cast on them, 56 had a 10. That's all I know. Measure the bore and stroke-that will tell you for sure. @Paul will know, I bet.
     
  3. Black Panther
    Joined: Jan 6, 2010
    Posts: 1,595

    Black Panther
    Member
    from SoCal

    A 555641 casting number block is a 303, made from 1949 till most likely 1953..most places say 1949-?
     
  4. Paul
    Joined: Aug 29, 2002
    Posts: 14,886

    Paul
    Editor

    What is the stamped number on the deck surface outer edge between cylinders 5 and 7?
     
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  5. Rckt98
    Joined: Jun 7, 2005
    Posts: 958

    Rckt98
    Member

    There will be a serial number stamped into the block on the side. A small flat area still visible when the head is on.
    I have a list of those codes at home if you can give us the number and no one beats me too it.
     
  6. Rckt98
    Joined: Jun 7, 2005
    Posts: 958

    Rckt98
    Member

    Paul beat me to it.
     

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