If you are referring to the holes in the center of the head, my motor is like that too.
So no issue then? And do those look like HP exhaust manifolds?
They look like HP manifolds to me too.
Welcome back. How were the slopes?They are!!!
If you look closely at this pic from my motor prior to install, you can see the void in the head. I think your 413 should have the same void.You are right. I think this one threw me off because it had been masked before painting and sticks out like a sore thumb.