Do you have the specs on the cam?
Blower cams typical have less overlap than NA cams. The valves don't open together for as long. I don't know first hand what kind of power you would loose. But if you can I would swap it out for another. Maybe you can find a low mileage used, or if you have to trade! How far are you from boosting, if at all?
I know that boost on NA cams, its harder to build boost because you are just pushing it right out during the overlap. From what I have seen its a pretty big loose at higher rpm's/boost. But like I said I really cant answer it the other way around