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Date code on engine block question

Lazboytt

Member
Hello,
Finally had the doghouse off again to see the date code on the block. Trying to figure out the code. If I’m correct I believe it’s a 6.5 November 4th 1999. Is someone able to confirm? Also is this a decent block? I’ve heard there are some blocks that were known to be bad during a certain production year. The person I purchased it from said it was a 6.5 and was optimized.

12555506 with K049

Any thoughts?
 

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86humv

Well-known member
Steel Soldiers Supporter
I don't think they use I...so oct.4 99....GM block, not GEP optimizer.
 
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