Timing belt

According to Mit1 you have a timing chain for the 3.8l engine

Removal
Remove the timing cover. Refer to ENGINE FRONT COVER.
Remove the camshaft position sensor drive gear.
Remove the bolt.
Remove the camshaft position sensor drive gear.
Fig. 123: Removing Camshaft Position Sensor Drive Gear
Courtesy of FORD MOTOR CO.
Rotate the crankshaft (6303) until the timing marks and keyways align.
Fig. 124: Aligning Timing Marks Of Crankshaft
Courtesy of FORD MOTOR CO.
Compress and install a retaining pin to hold the timing chain tensioner (6L266).
Fig. 125: Installing A Retaining Pin To Hold Timing Chain Tensioner
Courtesy of FORD MOTOR CO.
Remove the camshaft sprocket (6256), the crankshaft sprocket (6306) and the timing chain/belt (6268) as an assembly.
Fig. 126: Removing Camshaft Sprocket
Courtesy of FORD MOTOR CO.
Remove the timing chain tensioner.
Remove the bolts.
Remove the timing chain tensioner.
Fig. 127: Removing Timing Chain Tensioner