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  1. #1
    very casual GMLXSS's Avatar
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    Default Holden red 308 block and Holden Blue 308 block differences please?

    Hi all.

    Is it possible to use red 308 internals (everything) and heads straight swap into a blue 308 block from a WB Holden?

    Reason behind my question is the original red 308 has a score down the boar too deep to repair and I have a bare blue 308 block I could use.

    Thanks in advance.

  2. #2
    Sure why not? 76lxhatch's Avatar
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    If your red crank is an earlier one that uses a neoprene rear main seal then you'll need to sort something out with the rope seal block, but otherwise everything will fit. Obviously you'll need the same bell housing pattern too.

  3. #3
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by GMLXSS View Post
    Hi all.

    Is it possible to use red 308 internals (everything) and heads straight swap into a blue 308 block from a WB Holden?

    Reason behind my question is the original red 308 has a score down the boar too deep to repair and I have a bare blue 308 block I could use.

    Thanks in advance.
    .. thought of a sleeve for that one bore?
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  4. #4
    very casual GMLXSS's Avatar
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    I just wanted to make sure the block's deck height was the same (I hope I'm explaining that right). Will the crank, con-rods and pistons all fit the same? Piston will pull up before hitting the spark plug etc?

  5. #5
    Not the Kingswood! hq308's Avatar
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    Quote Originally Posted by GMLXSS View Post
    I just wanted to make sure the block's deck height was the same (I hope I'm explaining that right). Will the crank, con-rods and pistons all fit the same? Piston will pull up before hitting the spark plug etc?
    In standard form they are the same as far as critical dimensions are concerned.

    Given the age of these engines you're unlikely to know the full history of them so you'll need to measure things like bore diameter to see if your existing pistons will fit the bore.

  6. #6
    very casual GMLXSS's Avatar
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    Thanks guys, really appreciate your knowledge.

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