The 1973 Ford Thunderbird has trim changes, including new fender edge front turn signals this year. The 1973 Ford Thunderbird also includes the adoption of a trapezoidal opera window in the C-pillar that added some needed visibility. The Thunderbird has a 120.4-inch (3,058 mm) wheelbase, an overall length of 214 inches (5,436 mm) (growing to 225 inches (5,715 mm) by 1974), and a curb weight of 4,420 pounds (2,005 kg). This is the first model of the 6th generation of the Thunderbird.