At the risk of being laughed out of here by Jay and others, I would say for your RPM range the Sp2p would make the most torque.. I built a 416 for towing and the Sp2p made 30 ftlb more torque than a performer at 3000 rpm. Of course it was out of breath at 3600. For the 2000 to 3000 rpm range it would work well.