From a Classic Driver online listing:
As the Mustang line grew in size and comfort features, so too did the Shelby branded vehicles on which they are based. Never one to settle for standard, Carroll Shelby decided to take the already aggressive and bold styling of the 1969 Mustang even further. New front fenders, which included functioning brake ducts, were added which terminated in a big, full-width grill and bright chrome bumper set forward of this. Some other interesting design elements were included as well such as NACA ducts on the hood, rather than the traditional raised hood scoops.
While the 1969 Shelby cars focused much more on appearance than previous years, Shelby American still managed to create a better looking as well as a better performing platform, that lived up to the reputation their previous cars had garnered. Unfortunately, however, Carroll Shelby terminated his agreement with Ford in the summer of 1969, meaning no cars were built for the 1970 model year.
To read and see more: 1969 Ford GT350-H