Penske, Shelby, Hall, Gurney, Hill, Ginther, Reventlow, Miles, Cunningham, Krause - these are the men who dominated sports car racing in North America at the start of the 1958 racing season. They had spent a lot of their own money on the hobby they loved, but now they wanted something back. They wanted to go pro. For the next 16 years, the cars became progressively faster, the competition hotter, and the stakes higher. But what was it really like...