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

LT1 block casting numbers?

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Old May 31, 2003 | 02:20 PM
  #1  
SloMofo's Avatar
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Question LT1 block casting numbers?

Anyone have them?
I wanna be sure the block I have sitting here is an LT1 block

It has 327 stamped all over it. I dunno if that it some sort of GM code or if that means it is a 327 block

It does say GM 571G on it. Dunno if that means anything
Old May 31, 2003 | 02:35 PM
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96z
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LT1 blocks do have 327 stamped on them. Here is a pic curtoesy of shoebox.

http://csce.uark.edu/~jgbertr/rb/block_vin.jpg
Old May 31, 2003 | 10:21 PM
  #3  
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The GM part # for the LT1 block is 10125327..... hence, the "327"
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