If you haven't bought the Pro 5.0 yet, look into the MGW handle.
I wish I'd have known about it when I bought mine. They are sick.
Oh yeah, and I've got a friend who ran 12.69 @ 106.47 in his Mach with 4.10's and SLP catback and slicks. The man can drive.

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1997 Mustang GT "The Freak" - 13.80 @ 101.70, 2.07 60'
1995 Honda VFR750 - not much @ really fast (actual data pending.)
1964.5 Mustang 289
Rice Haters Club Member #13