What exactly are you inquiring about, the place where you've had a piston decapitation and the pieces have scarred the area around the crank (I don't know what the specific term for that area is lol) or the place where it's all chipped off? I would say the area around the crank is fine, just needs smoothed up a bit as it's most common. The chipped area needs welded and either carefully filed or re-machined IMHO. But I'm a novice, what do I know.