Here is the substructure i built. It will eventually be welded to the body of the car.
And here it is after all bungs welded, grinded smooth, and then bolted into place with the polyurethane pads. I used 1/4" pads, think that is enough space between the AME frame and the substructure? I am thinking i will be okay since i used 3/16" flatbar for the substructure and then the floor pans will be welded to that. shouldnt flex too much, but im open to suggestions if others think i should go with 1/2" polyurethane pad.
Oh, the flatbar spanning the width was just there for mockup so i dont tweak the substructure. It will eventually go away.