[02ztsian]

Try this tip: it may or may not work but there is a school of thought that Ford pulls timing with the clutch depressed to ease shifting. May help with hanging revs.
Locate the clutch position sensor-I believe it's red. The plunger should be depressed at rest and extends with the clutch in.
Tape the plunger so it always stays depressed. You will lose cruise control auto-shut off as the sensor, when depressed, cuts the cruise control to prevent over revving.
Can't hurt to try.