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Old 09-27-2017, 12:21 PM
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I just read that about the nickel too.
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Old 09-27-2017, 07:34 PM
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Good to know. I've heard arguments on both sides and never knew what to take of that.

I like Sam's view on the blocks.
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Old 09-28-2017, 05:29 AM
Kurt S Kurt S is offline
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Bergy can confirm, but there was only one supply of iron in the foundry. All blocks used the same.
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Old 09-28-2017, 01:09 PM
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Did GM use ferritic or ductile iron to cast 4 bolt caps and flywheels .If so is it possible that some blocks were also cast with same iron.Thanks Marc.
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Old 09-29-2017, 10:17 PM
Hotrodpaul Hotrodpaul is offline
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I think the blocks and 1st and 5th main caps are the same. High performance blocks and some truck applications after 1968 got nodular 4 bolt maincaps on 2-4 positions, identified by the N cast near the part number. I also had a 1966 L-79 Chevy II and I believe it had nodular 2 bolt caps. Usually these caps came with forged steel tufftrided cranks as well.

Paul
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Old 09-30-2017, 02:41 AM
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2482 caps are nodular iron and as far as I know all of the 400 blocks got nodular iron caps.
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Old 09-30-2017, 03:52 AM
frankk frankk is offline
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Great....so whats a 2482 cap????
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Old 09-30-2017, 04:48 AM
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Main caps found in many high perf blocks.

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