340 head gasket questions

The holes I am talking about are the very "smallest, tiniest" holes in the block surface, about the same size as for the locating dowels. There are evidently two between the two center cylinders, which I believe are supposed to penetrate the water jacket (I think mine may be plugged up).

There are two more tiny holes in the middle deck at the very rear, halfway between the two bolt holes that I believe penetrate the water jacket.

Then there may or may not be the same tiny holes (as above) in the front of the deck surface, halfway between the front head bolt holes. One of my fotos shows a kind of a "shadow" or perhaps "false" hole there (refer to post #2, the second/lower foto).