Positive crankcase ventilation

A PCV valve is necessary, but is it enough? I have seen racers use electric vacuum pumps and putting hoses from the valve cover to the exhaust collector. Are any of you running extra PCV accoutrements? If so, are you running the 'upgrade' with a PCV valve or without? I will hopefully bring life soon to a 383 with headers to life in a 67 fastback for reference. My application will rarely see the track, but I tend to get rowdy fairly often.