Abstract: In one embodiment, an engine block may comprise an interconnect having: a first manifold section, a second manifold section perpendicular to the first manifold section, the first manifold section and the second manifold section having a plurality of conduits to receive a gas flow, wherein the first manifold section and the second manifold section are formed from a single manifold device; a fuel cell stack housing coupled to the second manifold section to receive a fuel cell stack; and a fuel processor coupled to the first manifold section, wherein the fuel cell processor and the fuel cell stack operate at substantially the same temperature.