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What engine do I have?

Discussion in 'The Garage' started by turtlenut2, Jun 24, 2006.

  1. turtlenut2

    turtlenut2 Registered Member

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    I made a deal with my cousin to change his engine. He supposedly bought a 350 that I had to pull out of a C60 firetruck. It appears to be a small block chevy (it had an adapter plate, so that it would hitch up to the monster standard tranny) the harmonic balancer appears to be from a 350 but the flexplate that came off his old 350 doesn't have a big enough centerhole to fit the crank. I was told that it has to have 3 freeze plugs on the side if it's a 400sb (it has 2). How can I tell if it's a 383? Or am I just looking at it wrong?
     
  2. 1-ton

    1-ton 1/2 ton status Premium Member

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    It may be a tall deck 366/427 truck engine.
     
  3. MTChevy

    MTChevy 3/4 ton status Premium Member

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    got some casting numbers?
     
  4. turtlenut2

    turtlenut2 Registered Member

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    How do I tell?
     
  5. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    First off, how many bolts holding the valve covers on? 400 SBC's came with either 2 or 3 freeze plugs on the side so that doesn't help you any. 383 was not a factory GM engine but rather a stroker engine that people commonly build. How many bolts holding the intake manifold on?

    How about taking a pic of it for us to determine SBC or BBC. With the info i just gave we can determine that much for you anyways.
     
  6. turtlenut2

    turtlenut2 Registered Member

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    There are 4 valve cover bolts each. 12 Intake manifold bolts. casting numbers I found 3970010 and E145. Also has left side dipstick.
     
  7. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    3970010 is a 350 chevy, could be either 2 or 4 bolt main.
     
  8. turtlenut2

    turtlenut2 Registered Member

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    4 bolt main with 2 peice rear seal. My problem is finding flexplate that will fit the crank. I've ordered one for a 350 but the center hole is too small.
     
    Last edited: Jun 24, 2006
  9. sweetk30

    sweetk30 professional hooker Premium Member

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    if you orderd one for a 1 peice rear seal newer motor the crank style is diffrent. soinds like that.

    my friend pulled a 350 from a c60 bus and didnt have any real problems.
     
    Last edited: Jun 25, 2006
  10. u2slow

    u2slow 1/2 ton status

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    Hmmm... I know there are slight differences on the 350s that came in the heavier trucks. The heads have larger accessory holes for example. Perhaps the crank is unique also? :confused:

    If all else fails, try the stealership ;)
     
  11. 76zimmer

    76zimmer Flyin Rat Premium Member GMOTM Winner

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    I think the commercial applications used a unique setup for the flywheel flange on the crank, as they used bigger diameter flywheels.
     

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