The 1977 Mustang II was only featured minor trim changes from the previous year. These cosmetic changes were added to Mustang II in 1977 to make the car look more sporty. One of those changes was the addition of new bright colors. A T-roof was available, which allowed two pieces of the roof to be removed for a more open feel, since convertibles were still banned by the government. The same 1976 engines were available in 1977, but with a six-horsepower decrease from the 1976 302. Production was dropped down to 153,117 units for 1977.