I bought a custom trigger wheel from an outfit in TX. It was 36-1 wheel and the ID was slightly smaller than the OD of the outer edge of the pulley. I made a mandrel for the pulley and turned it on the lathe for a slip fit. Slipped thw wheel on the pulley and trued with an indicator and stitch welded it. I used tha diy hall effect and vr input signal. I mounted the sensor on the left viewing the front of the engine. I had pictures in my build thread but I think they're gone now. IIRC Slowe will make you a setup for the 36-1 trigger.