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Instead of the standard 1.5:1 ratio rockers, we went with COMP's 1.6:1 Pro Magnum set. With the leverage of a higher ratio, we gain about 8 percent in lift, without having to increase duration. It's a nice way to tap more high lift-flow than you'd normally get within a given duration range. The heads and cam made a stout little small-block, easily topping the 400 hp bragging barrier.