Ford 2003 Mustang Workshop Manual page 1449

removed and the cylinder heads are installed is the crankshaft or the camshaft to be
rotated. Severe piston and valve damage will occur.
CAUTION: Rotate the crankshaft counterclockwise only. Do not rotate past position
shown or severe piston or valve damage will occur.
Using the special tool, position the crankshaft.
7. Remove the special tool.
8. Install the crankshaft sprocket with the flange facing forward.
9. NOTE: LH timing chain shown; RH similar.
Install the LH timing chain onto the crankshaft sprocket, aligning the one copper link on the
timing chain (6268) with the slot on the crankshaft sprocket.
10. Verify the camshaft sprocket to copper link alignment.