Ford 2003 Mustang Workshop Manual page 1799

21. Position the oil pump and tighten the bolts in the sequence shown.
22. NOTE: Install a new O-ring if necessary.
Install the oil pump screen cover and tube.
23. Install the cylinder head gaskets.
24. CAUTION: The camshafts must be positioned so the camshaft keyway is 90 degrees
from the valve cover gasket surface to avoid damage to valves and pistons during timing