Hey P,
Check that your plastic shrouds around the radiator are all there. After doing my E-fans, I forgot to button up the plastic flaps on the bottom and the A/C wouldn't perform where it should. Got them back together and all is fine. Discovered this one day when I jumped out to check the oil when the truck was running. The damn A/C "radiator" burnt my arm when I leaned over it. The fans were not pulling enough CFM of air THROUGH the radiator stack however it was enough (with the 160* thermo) to keep the truck at 180*.
Just throwing it out as an out of the box check.