What to seal head studs

Yeah right... I'm Elvis

Not very convincing Photoshop in my honest opinion. lol

If you can show me I'm wrong, fine. I won't tolerate being called a liar

The only "photoshop" used in these was to crop them and scale them.

The only blind holes on one side of this block are the front lower hole and the hole adjacent to the oil upper oil galley (you can see the front upper hole with the pump boss)