A lot is going to depend on what the setup is and what you are going to do with it. If it is strictly a race setup with no street use then usually you can get away with a standard carb with the power valves plugged and the carb jetted up to compensate. This does not work well on an application that will get mostly street time. For those applications we do offer out of the box Holley carbs with Manifold Referenced Power Valves which will work correctly on the blower. These carbs will allow the use of the power valves which will give better idle quality and street driveability with a blower.