With the carb dialed in, we pulled the throttle lever and the big motor responded with a best of 630 hp at 5,600 rpm. The torque peak was 630 lb-ft at 4,700 rpm. So the change to a high-rise, single four-barrel intake picked up about 20 lb-ft and 20 hp over the dual-quad setup. That seemed about in line with our previous experiences with the Performer RPM intake manifold design, as it has always made really good power in this rpm range. A Mopar guy can't go wrong with either combination underhood. Both induction systems look great, and they both made excellent power for us.