Harley J. Earl came to the attention of General Motors when his coachwork on a Cadillac V-63 chassis impressed the General Manager of Cadillac. In 1927 Harley Earl created the La Salle and other Cadillacs. For 1933 Earl created the Cadillac Aero-Dynamic Coupe exhibited at the Chicago Century of Progress Exhibition. For 1938 Earl created the Buick Y-Job, a one-off concept for a future convertible. Most famously Harley Earl gave cars wings, supposed inspired by the wartime P-38 fighter. More innovations were tried out on the concept cars LeSabre and Buick XP-300 which had a wraparound windshield that was taken up by most American models very quickly. He managed the Chevrolet Corvette project, and produced many concepts that previewed General Motors products for the next seasons. William Mitchell succeeded Harley Earl in 1959, but Earl had already lost favour and Mitchell had overseen some culturally new designs for GM whilst Earl was on a European assignment.