Do you have rods in your head? I do.

cruiser said

Good point, Killer6. But it still bugs me. Something foreign in my cylinder head. It wouldn't be that tough for the guys to pull them out back when they were cast. Just seems lazy to me.

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Those support rods are in virtually every block and cylinder head from Chevy, Dodge and Ford that has ever been cast all the way back to the Model T. Modern casting techniques have eliminated the need for them, but they don't affect the cooling in any way. So other than them looking gnarly inside the water jacket there's nothing to be concerned about.