Valve Seat Correction Angles
WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
Grind valve seat to 45-degree angle. If seat is too wide after grinding, use a 30-degree stone to lower seat or a 60-degree stone to raise seat. See CYLINDER HEAD table under ENGINE SPECIFICATIONS.