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I pulled the spark plugs yesterday. All of the spark plugs look similar, except for the middle passenger spark plug. There is a heavy build up on it. I’m assuming from burning oil. Also, all the plugs had a bit of oil around the threads of the first ¼ - ½ of the plugs. My friend seems to think that it’s the piston rings.
Also, the inside of the engine block , right below the cylinder heads is a darker color. Does this look like an issue as well?
Most of those plugs show oiling, or at the least running very rich. As for the block, it's hard to tell from the photo, but you'll need to do a full teardown just to know for sure whether it's salvagable.