Depends on what channel your watching-----------you know-real deal or fake news--------actual chip making machinists or key board ers----------

If you don't have any cracked walls-----I'd recommend having the block honed on a Sunnen CK10 hone with torque plates to see what size it will clean up at, then order custom pistons for that size plus clearance------even if you have a hole or two that might be bigger you could still make the others smaller-------