I took a trip in my 57 T-Bird in 2000 to Chicago and made a Misc Box to fit the bottom of the trunk. I measured from the spare over and the flat part of the trunk from front to rear and made the box 3" deep, put on hasps and hinges painted it white, put a tweety bi4rd decal on it and filled it with tools, flares, hoses flashlight, flares etc, worked great, still had room for luggaghe etc on top of it and never used it in 6700 total miles, I understand there are now several of these misc boxes in T-birds. I think the depth of the box would relate to the depth of your trunk Dick 67 Imp Conv Crown