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

What kind of LT1 stock Alm. Heads do I have?

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Old Aug 8, 2007 | 08:56 PM
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snakeatinZ
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From: WaTaUgA, Tx
What kind of LT1 stock Alm. Heads do I have?
They came off a 1995 Pontiac Formula.
Thanks,
Steve
Last edited by snakeatinZ; Aug 9, 2007 at 09:49 PM.
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Old Aug 8, 2007 | 08:59 PM
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rskrause
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For practical purposes, they are all the same.

Rich
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Old Aug 8, 2007 | 09:19 PM
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mpe331lx
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They should be 643's or 374s.
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Old Aug 8, 2007 | 09:31 PM
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urbaNHunter44
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Originally Posted by rskrause
For practical purposes, they are all the same.

Rich

yep
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Old Aug 9, 2007 | 05:37 PM
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Injuneer
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Check this thread for photos showing visual differences between the 643 and 561 castings.

http://web.camaross.com/forums/showthread.php?t=427346
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Old Aug 9, 2007 | 09:50 PM
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snakeatinZ
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From: WaTaUgA, Tx
Originally Posted by snakeatinZ
They came off a 1995 Pontiac Formula.
Thanks,
Steve
643"s
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