From the outside, it looks like another '70s muscle car. On the inside, it's a gearhead fantasy come true. Every chunk of this 1972 Ford Torino's innards has been swapped for fresh parts. An extra gas tank has been fused onto its body. Controllers for laser jammers, radar detectors, GPS sensors and video cameras now occupy areas once reserved for 8-track players and beige-tinted shades. The vehicle has been hauled 2,700 miles on a tractor-trailer, from Gibsonville, North Carolina, to San Francisco. And on Wednesday, it'll begin a five-day, helter-skelter dash to reach Miami before hundreds of other cars cross...