We got it working. It turned out that ClearOS had installed a newer version of the kernel but since we hadn't rebooted the box in nearly 2 years it was still running on an old version while the WireGuard install was being built against the latest version installed. I simple reboot and everything worked as it should.
So you can just follow the centos install directions to install WireGuard. Just be sure you are actually running the same kernel as the latest installed LOL