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Jack/Harry-

 

I've heard of that being done, but I wouldn't do it.  The K241, K301, and K321 blocks do not have the same cylinder wall thickness to my knowledge. I have seen the K301 blocks that were only bored to a K241 bore, but I have not seen the same situation with a K321 block.  At 3.505" that bore might clean up at .010" over and likely would at 0.020" over unless there is bad scoring or wear that you haven't mentioned. If it wouldn't clean up at 0.030" over, I'd sleeve it back to standard bore.


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