Yep. If you stick a wire or something in that hole you’ll see where it comes out the bottom. Notice the corresponding hole on the deck of the engine block. Oils through the head just like any old LA head.
Yes sir, and like SSG Karg said you can check it with a wire or spray some cleaner through it. It is also a good idea to make sure the corresponding holes in the block are good and clean, and that the shop got the cam bearing holes aligned with them.