A simple fixture for 'glassing the floor in your body can be built with 2x4's. Take 2 longer than the length of your body from the firewall to the back pannel and set them to the width of your frame. Now nail 2 accross them long enough to go from side to side. On top of these last two boards, nail strips of 5/8'' plywood. This will give you a 3''channel. Set your floor in and fill the edge gaps with body putty. Now 'glass the floor in with two layers of matting. The first layer about 3'' wide and top that with another layer 6'' wide. I let it set for a day and then repete the same on the bottom.
Ron
Ron