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flywheel question

Discussion in 'The Garage' started by mechted, Oct 31, 2004.

  1. mechted

    mechted 1 ton status Premium Member

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    Hi
    just bought a 73 blazer /forums/images/graemlins/cool.gif with a 396 BBC out of a "69 chevelle" according to PO
    current drivetrain is th350-np203... and im looking to convert to an sm465-np205 i have
    so my question is what flywheel will i need? will the basic flywheel for a BBC/sm465 combo work? or do i need something specific to this engine /forums/images/graemlins/confused.gif /forums/images/graemlins/1zhelp.gif

    thanks
    Ted
     
  2. 70~K5

    70~K5 1/2 ton status

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    396 should be a internally balanced engine so a stanard flywheel is what you need.
     
  3. mechted

    mechted 1 ton status Premium Member

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    so the normal 454 flywheel will work?
     
  4. k20

    k20 3/4 ton status

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    no, 454 is externally balanced. A 396/402 is the only factory big block that is internally balanced(that i am aware of). You need a 396 flywheel.
     
  5. 70~K5

    70~K5 1/2 ton status

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    [ QUOTE ]
    no, 454 is externally balanced. A 396/402 is the only factory big block that is internally balanced(that i am aware of). You need a 396 flywheel.

    [/ QUOTE ]
    427 is internally balanced too.
     
  6. Thumper

    Thumper 1/2 ton status

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    Well, the early 454s are externally balanced. The later versions are internal balanced. I think its around 90 and newer. Dont ask me how I found this out! Its a long story. /forums/images/graemlins/rolleyes.gif

    Mike
     
  7. k20

    k20 3/4 ton status

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    Are the Gen V & VI internally balanced? Hmmmnnnn learn somethin new everyday.
     

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