Ford 2003 Mustang Workshop Manual page 1320

36. NOTE: There are 58 links in each timing chain.
If the copper links are not visible, mark one link on one end and one link on the other end to use
as timing marks.
37. Install the timing chain guides.
1. Position the LH timing chain guide.
2. Install and tighten the LH bolts.
3. Position the RH timing chain guide.
4. Install and tighten the RH bolts.
38. Install the crankshaft sprocket, making sure the flange faces forward.