Not 100% certain but IMO doing a grill delete or removing the honeycomb mesh will actually hurt cooling. Believe of not, Ford does put alot of thought into airflow and cooling. Take for example the GT350's grill. The center opening is about 50% of the grill size and it was mentioned in a Youtube video that this was done on purpose to maximize cooling and airflow. They designed certain areas to be blocked off so they can direct airflow in the correct path. Dremeling off these areas would probably be counterproductive from what they originally designed it to do. But hey, who knows if it actually makes a difference in day to day driving or not. Do the delete and just watch your temps.