Big block head casting #s

Discussion in 'High Performance Modifications' started by 76z28, Mar 14, 2011.

  1. 76z28

    76z28 Veteran Member

    1,633
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    Jun 29, 2009
    bakersfield
    What are the heads to look for and stay away from?
     
  2. 5spd540

    5spd540 Veteran Member Lifetime Gold Member

    12,256
    5
    Sep 19, 2009
    Guyton, GA
    A good set would be 781 or 049
     
  3. 76z28

    76z28 Veteran Member

    1,633
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    Jun 29, 2009
    bakersfield
    Alright thanks, all i really wanted to know!
     
  4. theflash

    theflash Veteran Member Lifetime Gold Member

    10,990
    6
    Feb 27, 2004
    Podunk, CT
    Those are the large chamber ovel port heads.
     
  5. 496z28

    496z28 Veteran Member Lifetime Gold Member

    941
    0
    Sep 23, 2007
    Oklahoma City
    The truth is.. 781 and 049's are the best large oval port heads because of the large intake runners. Those are good for upper rpm ranges.

    Peanut Port BBC heads are just as good for "STREET" cars. These are good for bottom end torque.

    I don't pass up any BBC head that isn't cracked.
     
  6. 76z28

    76z28 Veteran Member

    1,633
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    Jun 29, 2009
    bakersfield
    This is going to be a side project motor for either my camaro or my dads bel air.. So we will see
    I found another but he is unsure of size
     
  7. 76z28

    76z28 Veteran Member

    1,633
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    Jun 29, 2009
    bakersfield
    I found one from like 1988 for 300 bucks would that be a good buy? It is in a dump truck is what the guy told me and i can hear it if i want. I do plan on going through it if i do buy it. Any suggestions on what to look for? How can i tell it is a 366(something i dont want)
     
  8. 496z28

    496z28 Veteran Member Lifetime Gold Member

    941
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    Sep 23, 2007
    Oklahoma City
    If its in a dump truck its not a 454. It's most likely a 366 or a 427T

    If its still in the truck look at the glove box lid, it should have a sticker there, if not, Check the casting numbers on the drivers side rear of block on the bell housing flange.
     
  9. Rich Schmidt

    Rich Schmidt Veteran Member

    4,004
    1
    Mar 27, 2010
    Denville NJ
    If you are planning on building up a stock 454 truck engine then a set of early closed chamber heads will bring the compression up. All the pre 69 heads flow as well as the 781's but have chambers that are about 20 cc smaller. Good for about a 1.5 point bump in compression. My favorite castings are the old 063 heads but there are many others
     
  10. rustbucket79

    rustbucket79 Veteran Member

    Stay away from the 236 castings, they are the large chamber peanut port heads common in the 80's.
     

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