You can walk up the hood right now. Ford tough, LOLz. I had to use my truck as an emergency ladder in an emergency situation. Was able to walk up the hood, and then walk up the windshield without damaging anything. You would only have to strengthen the sheet metal to prevent dings.
Unless it's an olde pre '97, it's going to be a world record ugly mod.
You'll have to walk up the windshield to reach anything. The hood is pretty far from a roof rack. Your best bet is to just open the door, and stand on the floor, door sill or seat. Or just climb up the back of the truck and walk across the rack.
The rack I had, had removable, and movable beams. I removed the center ones so I could duck under the rear bar and walk in the bed between the rack bars. (loading motorcycles)
Just get a fiberglass ladder. Weighs less than the hood reinforcements, has multiple uses. We used ladders to crane bikes off the ground for easy repairs.