The FAM does a good job of showing their location, drilling them is impossible. You cut the donor dash big and then grind them off individually (carefully). Removing the existing one from the truck is again best done with die/burr grinders. The pinch weld area is very thin and needs extra care going out and in.
https://www.flickr.com/photos/advance-design_parts_co/12512838825/in/album-72157631868452754/