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Butler Performance Original 389, 400, 421, 428, 455 Block, Custom Bore, CORE-389-455

Butler Performance
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  • CORE-389-400-421-428-455
    • CORE-389-400-421-428-455
    We love to start with good customer block cores when possible. We will gladly arrange shipping to have your block shipped to us.

    We do not sell core blocks alone.

    Original Performance Prepped Block
    Cleaned
    Magnafluxed
    Sonic Tested

    Additional services for Blocks (added charge)
    completely deburred
    bored and honed with torque plate
    line honed with ARP main studs
    deck squared
    cam bearings and brass freeze plugs installed
    ready to build

    DUE TO LIMITED AVAILABILITY, WE ONLY SELL BLOCKS IN KITS OR ENGINES.
    Contact Us
    (866)762-7527
    Availability: In stock, ready to order for an engine kit, short block (kit or assembled), or a complete engine only. We do not sell core blocks alone.

    Description

    The Block

    We start with the exact same blocks you would build on your own. It's what we do to take these old dirty blocks that you see here to a beautiful custom built Butler engine. It takes many critical steps in order to become the proper foundation to be a custom Butler Performance engine.

    Step 1- 3 Step Cleaning Process

    -Baked, Blasted, and Cleaned

    Step 2- Visually Inspected

     

    Step 3- Magnafluxed/Sonic Tested

     

    Step 4- Replace Dowel Pins

     

    Step 5- Align Bored (if required)/ Align Honed

     

    Step 6- Bored and Honed with a Torque Plate

     

    Step 7- Square Decked

     

    Step 8- Deburred/ Final Multi Prep Process

     

    (It takes over a full days work for the final prepping process. Including tapping all bolt holes and cleaning all oil galleys)

    Step 9- Final Jet Wash/Cleaning/Wipe Down

     

    Step 10- Ready for Assembly

    Blocks start out in old worn, rusty, and grimy conditions

    3-Step cleaning Process where they are heat cleaned, sand blasted, and cleaned

    Machines used in block process

    Block being honed

    Custom machine shop at Butler Performance

    Block comes out clean and ready to be assembled