There's no question that the iconic 1955-57 "Tri Five" Chevy models were a tough act to follow. Even today, they're known as some of the most famous and popular classic cars of all time. So, when it came time to retire the Tri Five and develop a new design for 1958, what was Chevrolet to do? Well, true to form, they created a model that would go on to become just as famous as the cars before it: the Impala.