I'm not sure this will help in your search or not, but maybe if you go junkyarding. I have this setup as shown on my truck, an 82 D150. It has a double groove balancer and a double groove alternator pulley. When I got it, it had only a single groove water pump pulley which has since been replaced with a double groove. I do not have A/C so that's not why it has double grooves. I think it has to do with it being a truck engine? Better informed folks may correct me on that, but a slant truck might be what you want for these parts.