Refresh or Rebuild: One Cooked 4.0

I suspect a leaky fuel injector on #2. With the water pump smack in front of cylinder #1, that's the one that usually gets egg shaped first. Since #1 is fine and #2 is ovaled, I'd definitely check that injector.

Another thought is hone #2 with the ball hone, then put 0.005" oversized rings on that piston (gapped, of course).