In 2010, a 1970 Plymouth Superbird fetched $286,000 at an auction in Scottsdale, Arizona. In 2009, a 1970 Plymouth Hemi Barracuda sold for $2.16 million. Auctions of classic cars in general and muscle cars in particular routinely garner upwards of $39 million annually. Since their debut in the early 1960s, Americans have been in love with the horsepower under the hood of muscle cars like the GTO, Camaro, and Mustang. From their origins in Detroit, muscle cars became the stuff of dreams for millions of baby boomers. Car buff and historian Colin Romanick lifts the hood on these classics in...