I don't know what "should" be done but I had an old Landcruiser that had all the bottom end bearings done leaving the rest of the engine alone. Got it off the guy I used to work for like that, never had any issues.
I think perhaps tolerances would be tighter on new materials would actually end up making the rings stop slightly shorter than with "worn" parts.
Dunno. Not a mechanic haha.





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