Ford 2003 Mustang Workshop Manual page 1224

5. Tighten the bolts in the sequence shown in three stages.
Stage 1: Tighten to 2 Nm (18 lb-in).
Stage 2: Tighten to 20 Nm (15 lb-ft).
Stage 3: Tighten an additional 60 degrees.
6. Install the oil pan drain plug.
7. Raise the front subframe into position.