Roy Lunn, father of the Ford GT40, trendy SUV, dies at 92 Posted on August 16, 2017August 16, 2017 by Costa Oil - 10 Minute Oil Change A mechanical and aeronautical engineer who led improvement of the primary Jeep Cherokee and Ford’s unique GT40, Roy Lunn helped pioneer unitized our bodies for SUVs to assist meet fuel-economy necessities. Sending User Review 0 (0 votes)