I own an 03 Mach 1. The first thing you will notice, is that most of the time you will hit a wall going from 2nd to third at any RPMs over 5 grand if it is a 5 speed. I had to have the clutch beefed up, and put in a Steeda shifter to solve the problem.
This seems to be a great performance car. Very refined yet still with plenty of power. Potential for 325+ at the rear wheels is just a few boltons away. Handles like it's on rails. Leather interior and Mach 460 sound is awesome.
Right now it only has some 40 Series Flows on it (by PO) and they sound pretty mean.
With only 7400 miles on the ticker and at $19k, I thought it was a good deal. And the Azure Blue is a clean looking color!