308 heads

Imagine what the ports look like from the side as if you had the head on a flat surface and are looking at it as if it were a cross section diagram.

On the intake side, there is a water jacket right underneath the short turn and in front of the valve guide on the intake manifold side. There is also water on the other side of the seat on the intake manifold side but not as close to the surface as the short turn area.

On the exhaust side, there is water surrounding the valve guide but it gets pretty close to the surface between the guide and intake manifold and between/above the valve seat and guide boss. There's also water between the valve seat and intake manifold but it's not as near to the surface as in the other instances.