sentences:  The gasoline-powered deuces were built primarily by REO Motors, however, Studebaker also had a manufacturing contract from at least 1951 into the early 1960s.Curtis-Wright also had a contract in at least 1958 to build dump trucks with the Continental gas engine.The A1's had Continental LDS-427-2 turbo engines, equipped with either a model 4-450 Schwitzer turbo or a 4D454C Schwitzer turbo on later models, and 5th gear was an overdrive.