Can't answer the question about Ford, but port matching is where they grind on the intake manifold port exits that mate to the head to make them exactly the same size as the port entrances on the head itself. Edelbrock makes the manifold with extra aluminum around the port holes to give you enough to grind off to accomplish this. Typically they use an intake gasket as the template and they grind on both the head and the manifold to make the port holes match the holes in the gasket, which makes the port holes the exact same size so that they'll mate together without having a "lip". This creates a smoother transition from the intake manifold to the cylinder head, which improves airflow into the cylinder.