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Thread: 3999289 bbc block?

  1. #1
    Junior Member SHOW GUEST
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    3999289 bbc block?

    Is ok to use this block in a mild build? Any reasons not to?

  2. #2
    Senior Member RACING JUNKIE oldandtired's Avatar
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    72 - 79 454 with 2 bolt mains. Some "CE" replacement blocks had 4 bolt mains. I see no problems.
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triumph of evil is for good men to do nothing" Edmund Burke

  3. #3
    Senior Member DYNO OPERATOR
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    3999289

    Best 454 block other than 4 bolt #289 and #512 which are too expensive to buy usually.

    I use 2 bolt #289 blocks for 750+ HP 496 bracket engines without issues.

    Suggest ARP main studs and line hone for drag race use.

    I still have about 6 complete 454 1970s engines saved back just for 496 engines.

    About any MARK 4 454 block will work good.

  4. #4
    Junior Member SHOW GUEST
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    thanks guys, maybe its a go

  5. #5
    Senior Member EXPERT BUILDER
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    Like with any OEM GM block its best to sonic test for cylinder wall thickness.
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  6. #6
    Senior Member RACING JUNKIE oldandtired's Avatar
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    Quote Originally Posted by hink
    Like with any OEM GM block its best to sonic test for cylinder wall thickness.
    x2 I had a K block that tested dead center on the casting. We went +.100 on that one with no heating problems.
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triumph of evil is for good men to do nothing" Edmund Burke

  7. #7
    Senior Member DYNO OPERATOR
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    2999289

    Hink

    Ever find any early 454 BBC #289 or #959 blocks with enough core shift to matter for over bores .060" or less?

  8. #8
    Senior Member EXPERT BUILDER
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    Re: 2999289

    Quote Originally Posted by markdunlap
    Hink

    Ever find any early 454 BBC #289 or #959 blocks with enough core shift to matter for over bores .060" or less?
    Core shift really has noting to do with cylinder placement as I have seen many block that one cylinder would not pass a sonic test making the block useless for a performance build.

    I have seen a lot of blocks that show a lot of core shift if your going by the front cam journal and the cylinders sonic test fine. On the other hand I have seem many blocks that show perfect core shift and fail a sonic test.

    496 seem to be pretty common and I have seen early and late blocks fail for a 060 over bore.

    Being a production block they all have to be checked before any work is done.
    WWW.CNCBLOCKSNE.COM
    IS A DIVISION OF
    HINKSON AUTOMOTIVE
    RESEARCH & DEVELOPMENT

    CARL HINKSON 207-892-7215
    EMAIL [email protected]

  9. Racing Junk


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