I do not think that replacing a single piston is a realistic option. If a ring or rings are gone even on one piston or a part to the piston is gone...I would go through the entire engine. The chances of dusting a $19k engine is huge if you don't pull it down completely. But once you pull it down entirely...you might find some financial reason to just replace the piston that is a problem.
But if that is your direction, build it to trade, not to drive.
Without the financial pressure the wise way to go, once you tear it down, is to go with forged pistons, and rods as a minimum.
If you just replace the one piston...trade that machine to a dealer and let us all know the VIN...and start with a new truck. I am suspicious that you will find that the problem hole is the same one that you found the damaged spark plug. As you will recall, I recommended then, that you go directly to a dealership and trade the truck on a new one...
But if that is your direction, build it to trade, not to drive.
Without the financial pressure the wise way to go, once you tear it down, is to go with forged pistons, and rods as a minimum.
If you just replace the one piston...trade that machine to a dealer and let us all know the VIN...and start with a new truck. I am suspicious that you will find that the problem hole is the same one that you found the damaged spark plug. As you will recall, I recommended then, that you go directly to a dealership and trade the truck on a new one...