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Old 07-12-2017, 05:32 PM
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Default 65 vs 72 BBC short block pros & cons

I have a
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Old 07-13-2017, 12:25 PM
L78steve L78steve is offline
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If your 65 block is cast prior to August then its the "Fang" block. The cylinders can be opened up to .125 beyond 427 bore. Its a keeper.
August 65 on, the block had the same casting number for some unknown reason but lost the thick cylinders and the fangs.
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Old 07-13-2017, 03:25 PM
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Dave;

As long as the bores measure out good and the pistons are still in good shape, you can swap out the rotator from the `65 block into the `72 unit. That alleviates the rear cam bearing snafu as well as the need to run a canister oil filter or one of those wonky adapters.

Eric
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Old 07-13-2017, 03:38 PM
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I would sonic test it.
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Old 07-14-2017, 04:44 AM
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My 1965 Z-16 Chevelle motor had been bored out to a 4.25 (plus another .060 for a total bore size of 4.310 and 440 CID). I've heard this was only possible on the thick-walled, 1965 4-bolt main blocks.
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