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What year is this LS1 motor from ?

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Old 01-29-2011, 07:22 PM
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Default What year is this LS1 motor from ?
I'm having trouble finding what year the motor is from.

Numbers on the block

12560626
1Y5127967
J012/703
0107E6522856

Heads
0010700685329805
0010700685129855

Any help would be very very much appreciated.
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Old 01-29-2011, 07:32 PM
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Hi,
check your first numbers 12560626 ........let me know......jim
ps: three digit cast number on heads....
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Old 01-29-2011, 07:43 PM
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hi, if your number is correct you have a 99-up -generation 3-350 block-cross bolted
aluminum block.jim
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Old 01-29-2011, 08:03 PM
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yeah the first set of numbers I listed for the block aren't coming up with anything..
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Old 01-29-2011, 08:04 PM
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Originally Posted by jim ravencraft
Hi,
check your first numbers 12560626 ........let me know......jim
ps: three digit cast number on heads....
yeah the first set of numbers I listed for the block aren't coming up with anything..
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Old 01-30-2011, 06:29 PM
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OP......off topic but I like your handle... great movie
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Old 01-31-2011, 05:52 PM
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the 3 digit number is 853
can you help?
thanks man
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Old 01-31-2011, 05:52 PM
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Default 3 digit number is 853
Originally Posted by jim ravencraft
Hi,
check your first numbers 12560626 ........let me know......jim
ps: three digit cast number on heads....


the 3 digit number is 853
can you help?
thanks man
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Old 01-31-2011, 07:01 PM
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Thoughs heads were used on 99 and some 2000 LS1 engines
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Old 01-31-2011, 07:14 PM
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Thats a 99 buddy!
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