Yeah, me too. These pics show the damage to the piston, I can't see the bottom of the head and I can't see if the top ring land is crushed. To pull the head means removing every accessory on the engine, as they are all mounted to, or through the timing cover. The big mountain range is the exhaust side, the smaller range is the intake side. My biggest concern, aside from the obvious damage (with matching damage on the head I'm sure), is that it is so peaky.
Originally Posted by Cujet
Just an FYI, modest damage to the piston crown surface and cylinder head surface will not affect the engine one bit. The problem comes in when piston damage is severe enough to crack or distort the piston then stick a ring or cause aluminum chunks to break off. We've had high HP race engines ingest all sorts of track debris and cause all manner of surface distortions, without any affect on HP or reliability. Entire seasons were raced with some pretty rough looking components. HOWEVER the screw, if steel, is probably stuck on the catalytic converter and there may be some possibility of it finding it's way back into the engine.