BigRich

So I have a 98 gt with a fresh engine rebuild and I can't get it running right. It runs extremely rough and blows clouds of white/ bluish smoke and smells rich. I changed the injectors, wires, plugs and cleaned out the fuel rails. Nothing has made a bit of difference. I love my car. It was the first car I bought new and I have taken great care of it and can't stand the thought of getting rid of her. PLEASE HELP!!!