As always, its your car and you will do as you please....but let me echo the thoughts of some others here, it is a Mach 1 and should stay Mach 1 imho. I also feel the kit would detract from the Mach 1 theme and retro appeal.
Roush has done some Machs with the Stage 3 kit and it looked okay, I guess you never know. Please post a pic if/when you do it!
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2003 Jack Roush Classic Stg 3 #34 of 46 Built!
Zinc Yellow (the only one)
Roush Serial # 7425
Built 1/13/03
1985 Canyon Red SVO- My 1st Stang, sold
MCA 56545