I believe the holes for the larger emblem were drilled when the fender was manufactured. I bought a NOS fender a number of years ago, and that's how it came. You'll probably need to remove your Cheyenne emblems so that you can measure the SUPER emblem hole locations relative to the existing holes.
There's a photo of a NOS fender in this thread.
http://67-72chevytrucks.com/vboard/s...ght=Nos+fender