We found this "trunk" at a yard sale for $10. Think it is for auto, but not Chevy according to those in VCCA and our region. It is black steel, 13.5" x 13.5" x 37" It has what appears to be a plywood bottom. 90 degree square at base all around; corners and edges, vertical and along top, are curved about 3/4" radius. Can't seem to post picture here but available my email AOL. If any can use, it is free for shipping to get to good home.