Hey Dawg, A number of years ago, a guy ‘Sandman’ , who was a member here, had a half dozen of these (harmonic balancer crank pully ) made. They werent cheap, but seemed to do their job on a hot B that I made. Dont know what happened to Sandman, but like dummy... I left that balancer on the B when sold to some kid in Europe ! Wished Id bought two then.