Broken Rocker Shaft Bolt Removal

OK, that would be goo. Well double check on where it goes; find where it is going into the intake port, plug that temporarily, and see if you can slowly dribble water with a tiny bit of soap mixed into it into the hole and it eventually fills up and stays put. (The soap will help the water get through small cracks more easily to help find any other leak area. I would not spray but dribble the soap and water mix to avoid excess bubbles.)

That says you have only 1 leak and IMHO, a leak into the intake port would be quite manageable.