If you want to keep lower end torque, the 180's would work best. If you want upper end hp, the 200cc would be best. That cam is probably going to want something bigger than 180's as it will pull to 6500 rpm. If your cam was smaller, like an XE268 or a Magnum 270, I'd say go for the 180's. That 292 is not going to give you a lot of bottom end torque anyway, and I don't think 180's would help that much. Give Dart a call and ask one of their technicians for a recommendation.