For the 1978 model year, the second-generation Bronco was introduced; to better compete with the Chevrolet K5 Blazer, Dodge Ramcharger, and Jeep Cherokee, the Bronco entered the full-size SUV segment. In place of a model-specific chassis, the Bronco was adapted directly from the Ford F-Series, becoming a shortened version of the F-100 4x4. Originally intended for a 1974 launch, the second-generation Bronco (named "Project Shorthorn" during its development) was postponed to 1978 in response to fuel economy concerns related to the 1973 fuel crisis; the second-generation Bronco was released for sale after development was nearly finalized on its 1980 successor.