1962 Pontiac Catalina - Super Special Super-Duty
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No. 540306 Super-Duty cylinder heads were rebuilt and ported by a noted Pontiac racer and flow around 260 cfm at 28 inches on the intake side, while exhaust flow is roughly 75 percent of that number. A set of stainless-steel Dart intake and exhaust valves measuring 1.97 and 1.625 inches, respectively, replaced the original 1.92/1.66-inch units. Comp Cams supplied the valvesprings. View Related Article
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