Are you able to move the knobs on the radio inboard so as to use the innermost holes in the dash? I'll bet you can. That radio looks like it was designed for your truck. That would provide a more correct look. Then you can fill all of the extra holes.
Maybe do some measuring before you decide. To my eyes, the inner set of holes look to be off. They should be equal distance from the center opening and that right side sure looks closer than the left. I can post edge to edge measurements in the morning.
