You need an Auto Meter 9117 Tach adapter.
It feeds off the common positive wire.
Instructions on Install here
http://www.jegs.com/InstallationInst...5/105-9117.pdf
Here's a video of an install on a 99-04 Mustang with the Coil On Plug system like yours.
http://www.youtube.com/watch?v=05lFAKN9uy4
Wire you clip here I believe...
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Last edited by EsCoRtLvR; Oct 21, 2011 at 11:46 PM.