I've been using the HEI stand alone systems, got one of the cheapies (relative) from Summit and it seems to work fine. I've always thought the MSD systems to be a bit too sensitive for the street. I'm fairly sure you would have to have the car on a dyno to see any improvement over the HEI stand alone distributor. JMO but a lot of the race stuff should be left as that, race only. Eleven months of street use would equate to thousands of passes on the drag strip or a lot of laps on a circle track.