Did you put the front is up on ramps or jack stands? Even a steep driveway or on a hill to get the angle of the motor "up", so the air will search for the open radiator cap. If your bleed screw hasnt been snapped off open that too. take your time, keep filling the rad and watch the bubbles for about 2 beers with a friend or two and you should be good to go.

-Royce