A lot of us have trucks that have been "fixed" by agencies or people in the past. One common "fix" is to grind off the tailgate chain holder and hook slot. I woke up Sunday morning in the back of a M35 surrounded by M715's. So, out came the camera.

Left ot right, outside to outside is 1-3/4"
Up and down is 4"
The end sticks out from the bed 2-5/8"