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I* am looking for a 6.5 diesel engine for our 1998 K2500 Suburban I am not sure what

How deep are the pits on the cyl walls? Can it be lightly honed out w/o oversize pistons? Maybe the engine can be saved...

This is an extreme example of why I recommend new rings on military surplus engines, but, I don't know that they get this bad w/o rainwater or blown head gaskets. One of my engines did have some minor discoloration and small pits after 40K and a light hone touch up during an overhaul.
 
The block is cracked at the main. The pitting could be cleaned up with a bore or sleeve.
 

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