i think its fine i was talking to a guy about doing a test and he said cummins are known to loose pressure in 4 and 6 or some thing like that idk

 

when you re-ring it you need to check the cylinders and if they are not to worn you can hone the cylinders.

 

I am over 220k on the stock bottom end and have had no issues with it at all.

If you have a issue in the bottom it will easily show its ugly head,trust me.

At 200k when I lifted the head due to a touch to much timing,boost and nitrous my cylinders still had the cross hatching in them.Had the head machined flat and re did the o-rings and used a new .020 gasket and its been together ever sice.