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Fly wheel?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by TOOLMAN125, Feb 27, 2003.

  1. TOOLMAN125

    TOOLMAN125 Registered Member

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    I am looking to get rid of my th350/203 in my 77 chevy k10 and swich to a manual sm465/205. i need a flywheel but they want to know if my engine a 305 is internaly balanced or externaly balanced how can i tell the difference.
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    The only small block that was externally balanced was the 400. The 305 and 350 are both internally balanced.

    Rene
     
  3. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    That was a true statement before 1986 when GM went to the one piece rear main seal and made all SBC's external balanced but only on the rear. Given the fact that he is working on a 79 you are correct unless someone swapped in a 1986 or later engine. /forums/images/graemlins/crazy.gif
     
  4. BigBen

    BigBen 1/2 ton status Premium Member

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    Yup, 350 pre 1-piece seal was internal balanced.

    I just had to swapt Flywheels on my 383.... it needed the external counterbalance parts (400 SBC crank). Don't ask how I found out /forums/images/graemlins/blush.gif, but it shook like a B!tch before I changed it this weekend.

    If you need a good condition used 168 tooth flywheel for a 350 PM me. I also have the zero balance damper/timing tab (almost new) that I had to change out.

    -Ben
     
  5. u2slow

    u2slow 1/2 ton status

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    You wouldn't get far with the wrong flywheel... the 1-piece seal flywheel has a smaller bolt pattern on the crank than the 2-piece.
     
  6. BigBen

    BigBen 1/2 ton status Premium Member

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    Good Point! /forums/images/graemlins/thumb.gif
     

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