Pikes Peak’s thin air punishes forced induction, which is why the 1969 Camaro known as Big Red traded its usual supercharged big-block for a naturally aspirated combination built just for the mountain. Another competitor drove his twin-turbo street Mustang nearly 3,600 miles round-trip simply to reach the starting line, then raced through goats and fog. Read on to see how two very different preparation strategies played out on the same 12.42-mile course.