Looking at the OAP website it looks like their system is designed to work with a one pulley harmonic balancer. The alternator is run right off the compressor. So I believe a dual pulley is not needed? They did not mention needing one.
Interesting, they also have a bracket for the chevy 250 engines to mount the compressor on the passanger side. I wonder if this could work with the 235 and if anyone has tried this.
