For you guys running electric fans, is it necessary to enclose the electric fan in a shroud that covers the entire radiator? Or will the fan cool just as good just sitting in front with the fan diameter covering the radiator? I will be running a high cfm fan out of a mark VII that I all ready have which is a single fan. I will have A/C, automatic transmission, and a 4 pass aluminum radiator. Any opinions out there thanks Mark.