At its August 1965 launch, the Bronco was offered with a 170-cubic-inch inline six. Derived from the Ford Falcon, the 105-hp engine was modified with solid valve lifters, a oil pan, heavy-duty fuel pump, oil-bath air cleaner, and carburetor with a float bowl compensated against tilting. In March 1966, a 200-hp 289-cubic-inch V8 was introduced as an option. For the 1969 model year, the 289 V8 was enlarged to 302 cubic inches, remaining through the 1977 model year. For 1973, a 200 cubic-inch inline six became the standard engine, offered through 1977.