mustang77The first-generation Mustangs grew in size; the 1973 model had become markedly larger than the orinal model. The pony car market segment saw decreasing sales in the early-1970s with many buyers turning to lower-priced,Total Ford Production for 1977 : 1,840,427: Total 1977 Mustang II production : 153,173: 1977 Ford Mustang II: Ghia Notchback Coupe 2 dr. 4 P (by Ghia) : : 29,510