I bought an electric fan and shroud at Auto-Fair .It has little rubber flap vents in the corners. Shoudn't they be turned so they open to the inside with the shroud in front of the radiator?
hotrodbrad's right - a shroud in front of your radiator will impede airflow over the radiator at highway speed unless you're running a big and powerful fan. Shrouds are usually for puller fans mounted behind the radiator.