A vehicular space frame assembly includes a plurality of structural components that are secured together to define an enclosed three-dimensional space. A plurality of body closure panels, such as a pair of door closure panels, a front windshield closure panel, a rear windshield closure panel, and a floor pan closure panel, are mounted on the structural components. Each of the body closure panels is a generally flat panel having one or more open spaces provided therein to support other components of the vehicular body on the space frame assembly. The body closure panels may have respective recesses formed therein that receive portions of the associated structural components therein. The recesses may be sized and shaped to receive the receive these portions in a snap fit relationship. One or more gaskets or other conventional sealing devices may be disposed between each of the body closure panels and the associated structural components of the vehicular space frame assembly. Additionally, other gaskets may be provided on the body closure panels to provide a sealed engagement with the other components of the vehicular body and frame assembly.