crank for tall block???
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crank for tall block???

  1. #1
    Senior Member vmaxed's Avatar
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    Default crank for tall block???

    Can you put a 4.5 crank in a Chevrolet 427 tall deck block????
    "DON'T JUST TELL ME IT WON'T WORK TELL ME WHAT WILL"

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  3. #2
    gn7
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    Quote Originally Posted by vmaxed View Post
    Can you put a 4.5 crank in a Chevrolet 427 tall deck block????
    If you're careful. The right rods help a lot.
    Some blocks, pre 1970, require much more work with a hand grinder. Pre 70 blocks are not notched to even clear a 4.00 crank, so you really have your work cut out for you regardless of the rods. Notch the bottom of the cylinders too much, and you're into the water jacket. Grind too much, if you need to(probably will) on the left side of the oil pan rail, and you're into the main oil gallery
    The crank will have to be one cut for 6.535 rods. A crank with counterweight for a 6.7 rod like a Callies will run into big issues with the counterweights.

    Yes, if can be done. The question is, WHY? You powering a tug boat?



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    Last edited by gn7; 02-25-2014 at 07:15 PM.

  4. #3
    Senior Member vmaxed's Avatar
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    Default stump puller

    It's not boat related, a buddy is building a tow vehicle and if you have to buy a crank be all you can be.
    Thanks
    "DON'T JUST TELL ME IT WON'T WORK TELL ME WHAT WILL"

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