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LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Is this an LT1 block?

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Old Jan 1, 2007 | 03:17 PM
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bombebomb's Avatar
bombebomb
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Is this an LT1 block?
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Old Jan 1, 2007 | 03:29 PM
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looks like it might be one but it could be a good ol 350 to
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Old Jan 1, 2007 | 03:37 PM
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Looks to be a 2 bolt LT1 block.
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Old Jan 1, 2007 | 08:58 PM
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Ok Thanks!
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Old Jan 1, 2007 | 09:10 PM
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hotrod18_69
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Yup, thats an LT1 block.
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Old Jan 1, 2007 | 10:06 PM
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Yep,

It doesn't have a mount for a fuel pump and it has the hole for the water pump drive AND it has the correct holes for the water pump so yes it is a LT1 block.

Bret
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Old Jan 3, 2007 | 09:11 PM
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robss96dcm
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It could also be a 4.3L L99 block. What are the casting numbers?
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Old Jan 4, 2007 | 12:19 PM
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Injuneer
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The LT1 block will have "327" cast on the front. The L99 will have "4.3" cast on it.
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