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Thread: 454 marine engine questions
          
   
   

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  1. 11-28-2006 11:50 PM #31
    76GMC1500
    76GMC1500 is offline CHR Member
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    You're not going to know what is inside of the block based on the numbers on the outside. The 427-502 all use the same block, I believe.
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  3. 11-28-2006 11:54 PM #32
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    pat mccarthy
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    Quote Originally Posted by 76GMC1500
    You're not going to know what is inside of the block based on the numbers on the outside. The 427-502 all use the same block, I believe.
    no 502 is a bow tie p/n10051107 two pice rear seal or a 502 block p/n 10237300 one pice rear seal
    Last edited by pat mccarthy; 11-29-2006 at 12:16 AM.
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  4. 11-28-2006 11:58 PM #33
    AdamB
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    Okay... that complicates things LOL. Oh well, that's why I am asking questions here before I do anything stupid.
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  5. 11-30-2006 03:17 PM #34
    AdamB
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    Well, I still can't make out the block casting #, but it has 7.4 stamped on the side so it's a 454. Anyhow, the heads are peanut, 14092360. So some 049's or 781 are definitely in order to increase the horsepower LOL.
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