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What to build...427 vs. 468

Discussion in 'The Garage' started by mountainexplorer, Apr 7, 2002.

  1. mountainexplorer

    mountainexplorer 1/2 ton status

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    Spokane, Wa./Ione, Wa
    I'm debating on what motor to build for my '80 GMC. It will be entered in local mud races, but also driven on the street once in a while and alot off road. My options are a .060 over 427, std. steel crank, domed Keith Black pistons, and open chamber heads. Or, a .060 over 454 (468 ci) with the cast crank, flat top pistons and closed chamber heads. The truck will have 40" tires, 4.56 gears and a 4spd/205. Which motor sounds like the best application?
     
  2. Blazer79

    Blazer79 1/2 ton status

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    There's no replacement for displacement. That's my 2 cents. /forums/images/icons/smile.gif
     
  3. Tommy

    Tommy 1/2 ton status

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    I have a 427 now, but I'm hunting a 454 to put in, like he said, no replacement for displacement
     
  4. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Do the 468. It makes more torque.

    The 427 is more a high winder, resulting in higher end motor.
     
  5. zakk

    zakk 1/2 ton status

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    468 on acohol with a 8/71 BDS blower and Litenfielder FI./forums/images/icons/smile.gif

    but that is after I win the lottery

    Eagle Racing engines makes a really nice, all aluminum 632 motor. I heard it has pretty good HP/forums/images/icons/laugh.gif
     
  6. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Like they say " no replacement for displacement". " when in doubt, bore it out" Go with the largest engine you can afford to build.
     

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