Cargo Area Cover Floor Aluminum Steel 510 WagonMetal for the cargo area in Datsun 510 wagon 1968 73. The metal can be used as a cover or as replacement metal (steel) if the floor is rusted. The metal will give a flat surface instead of the original ridges. The metal can be covered with a material to give a finished look in the cargo area. Choose from cargo area or rear seat cover. Choose from aluminum (. 080" thick) or steel (. 026" thick). *Allow 5 day delay for custom parts.