Under the car's hood, a ROUSH Performance 427SR twists big horsepower into rocket-like torque. That mill rides a Mustang II suspension, which employs Bilstein shocks, Ridetech air bags and power rack-and-pinion steering. Behind that front clip, a Gearstar-built C6 jerks a Gear Vendor overdrive unit, which rides atop a third electric cooling fan. Behind that driveline, a tough Currie 9-inch spins 31-spline axles, a posi-trac differential and big, 3.73 gears between two more Ridetech air bags.