how do I identify the block type of a 425 / 455 ?

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Old November 18th, 2007, 03:20 AM
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Question how do I identify the block type of a 425 / 455 ?

And are any better than others ?

My engine rebuilder says the first 455 I gave him is stuffed, but before I let him scrap it I thought I had better ask
Gary T
Oldsmobile club of Australia.
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Old November 18th, 2007, 01:25 PM
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Originally Posted by Aussie67Delta88Custom
My engine rebuilder says the first 455 I gave him is stuffed,
Did he say how? Is is not worth repair or not repairable at all? There should be some guys on here that can help you ID an engine if you provide some data for them to go with.
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Old November 18th, 2007, 02:51 PM
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If the motor is stock to the car, I don't think it's a 455. I have no info on a 455 before 1968.

But I could tell you what block you have, if you believe it's a 1967. The only info I have on big blocks in 67 are as follows

1966-67 [390925 block]

    1966-67 [389244 block]

      1967 [390925 block w/.375 drill spot]

        1967 [389244 block w/.203 drill spot]

          1967 [389244 block w/.375 drill spot]
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            Old November 18th, 2007, 09:16 PM
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            Originally Posted by Aussie67Delta88Custom
            And are any better than others ? ........
            Assuming, you are talking about blocks/cranks:

            Unless you are planning a "full on" racing engine, one is as good as the next.

            Norm
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