uh oh... I don't remember tossing this, but I can't find it in the garage now.
BUT looking back on the pictures where I had the 4.3 in the car still I think I couldn't use it anyways. My trans bracing I made goes under the trany and would be in the way of this plate thingy. Its probably for the best though. I was concerned about my trans brace being less than secure. I guess I can fab up some bracing to secure it to each side subframes.
^^^ kinda like this.