I'm going to use one of the Jesel belt drives I have on this motor up
As far as harmonics in the drive I am a lot more worried about the internal drive harmonics rotating the compressor in or at 72,000 RPM.
I am planning on shifting the motor before 8000 RPM and gear the Procharger for less than 30 Lbs. of boost at or above 7000 RPM work luck
I have a lot of learning to accomplish to get good on tuning a Pro Charger motor luck wrench shruggy

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)