I've got some questions about the 833 head pictures
1.) The second pic, showing the exhaust ports, on the left side of the rocket valley, there is a hole in the side of the head, what was in that or why is it there? Is it tapped, or just a hole?
2.) Same picture, the second to last bolt hole for the manifolds, is that filled, or have some sort of gunk in it?
3.) The third picture, the right side second to last intake bolt hole, is that a crack from the hole to the top part of the head, or something else?