Complex sentence: After selling an article to "Motor Trend" in 1957 for $50, Davis became a contributing writer to "Car and Driver" magazine from 1962-67, where he became friends with racing luminaries including Juan Manuel Fangio, Dan Gurney and Carroll Shelby.
Split into simpler sentences: After selling an article to "Motor Trend" in 1957 for $50, Davis became a contributing writer to "Car and Driver" magazine from 1962-67. At the magazine, he became friends with automotive luminaries including race car drivers Juan Manuel Fangio, Dan Gurney and Carroll Shelby.