Nicely set up performance carbs are nicer than the injection system, although fuel consumtion will go up. Fuel injection, unless performance tuned is too restrictive. I would have converted my 8V by now, but the Spanish authorities will not allow it. If you intend to use the car for competition, you need to retain the injection system as the engine has to look the same as it came from the factory. You can put in hot cams and work the internals, but you cannot fit carbs, turbos etc.