Do you see core shift?

Discussion in 'Street/strip 400/430/455' started by 67Skybird, May 27, 2020.

  1. 67Skybird

    67Skybird Josh - Minnesota

    Brought my block to the machinist to be magnafluxed and have the bores sonic checked before going forward. Took a couple pictures of the valley and casting number. Wondering if you guys see core shift in the lifter bores? I should have wall thickness by the end of next week.

    Thanks
    Josh
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  2. alvareracing

    alvareracing Platinum Level Contributor

    can't really tell by the pic, but doesn't look bad. Measure it and you will know. Also if that's a keeper after your sonic test, I would go in there and remove all those sharp jagged edges from around the lifter bores in the cam tunnel. Smooth everything out with rounded edges. I also like to polish the inside, especially the 4 corners where oil drains back from the heads. I like to take a few days polishing/smoothing out the rough casting texture underneath. Anything to help oil from not clinging causing drag, but to help drain back to the pan faster.
    ps: don't forget to measure lifter bores while you are there, hint! hint!
     
  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

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