Shane Struthers, and his father Gene, built this Mach 1 from the ground up over a year's time. At just 17 years of age, Shane has plenty of time to enjoy his Mustang in the future. Having followed the Hot Rod Power Tour in 2011, Shane dropped more than $1,000 on high-priced gasoline to make the trip. With the three-speed automatic, the Mach 1 was turning 3,000 rpm at 70 mph, and sucking the tank dry. Now with the added overdrive from Monster, Shane tells us that the Mach is now a highway cruiser turning just 1,750 rpm at 75 mph. That'll keep those butterflies closed a bit more and likely improve fuel mileage considerably.