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Engine Code Identification

Old May 4, 2018 | 02:40 PM
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Default Engine Code Identification

Hi All,
How do I determine what the numbers/letters stamped into the front of the engine block, just in front of the passenger side head, mean?
I have a Blazer with an engine that did not come from the factory.
The numbers are W3 1253LT, then there is a 599 just below these numbers, then a much larger 2 below all the numbers.
Thanks,
RTJ49
 
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