Complex sentence: All of Chrysler's full sized cars, except Imperial, received major makeovers for 1965, the work of Chief of Design, Elwood Engel, who was hired away from Ford Motor Company a few years earlier.
Split into simpler sentences: All of Chrysler's full sized cars, except the Imperial, received major makeovers for the 1965 model year. They were the work of Chief of Design, Elwood Engel, who was hired away from Ford Motor Company a few years earlier.