Bill,
Perry sells a pump that works great for this size engine, as well as the larger Mokis. I have a VC-30 which runs off crankcase pressure, meaning that you will have to drill and tap the back of the crankcase. The pressure line goes to the back of the pump, then your fuel line goes in one side and out the other into the carb. There is another version that runs off the oscillation created by the running engine, but I have had success with the pressure one. When you use the pump, you will notice a dramatic improvement in throttle response, as well as more power and easier tuning.