Has anyone considered blocking off part of the grill? I know that cars will do this for aerodynamics, at the expense of cooling capacity. My understanding is that our cooling system is more than efficient enough. After peering into the grill, i took notice of the location of the transmission cooler and the A/c condensor. I think these will remain sufficiently cool as well if one were to block off the top and bottom rows. so, my question is, would this produce a significant change in the aerodynamics?