you will be VERY VERY lucky of there is no damage to the head. Piston would of hit the valves on that cylinder which would damage valves/rocker arm/rocker locating post.
It happened to me and i suffered a broken rocker/roller arm & broke the arm locating pin it sits on. Engine did fire on 3 cylinders thou. Check and see what damage by taking off rocker cover but tbh just swap whole engine. easier & cheaper.