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As the graph shows, the 383-cube 351C proved to be a stout motor. Going by the peak power figures of 524 hp at 6,500 rpm and 480 lb-ft of torque at a touch over 4,500 rpm-the engine acts a lot like a Cleveland 4V. But take a look at that flat torque curve. There is more than 400 lb-ft of torque available at 3,000 rpm, and the Cleveland is still pulling like a freight train at 6,500 rpm. Both monster torque and high-rpm horsepower are what you get with Trick Flow's Power Port Cleveland 190 heads.