Governor Huckabee made a major economic announcement in Marion at the site of a truck parts plant. The Hino Motors Limited decision to build the plant in Arkansas is a prelude to building an assembly plant. Hino should announce plans later for an assembly plant to open sometime around 2007. The sources said Hino would announce, possibly this summer, that it would build trucks at Marion as part of its separately announced plan to increase international sales. Hino makes medium and large trucks and buses. The vehicle assembly plant would be the state`s first general use auto plant since the Climber automobile was built at Little Rock between 1919 and 1923. Conway is home to a school bus assembly plant.