Just thought Id put my 2 cents in. I had a 17" thermo with a switch that measured temp, adjustable, kicked in blah blah and my mild 302 kept overheating. No shroud mind you, mechanics in the area said the thermos don't need one, I dont agree but that's what 2 of them said. I put a plastic flex fan with original shroud and my cooling issues ceased. Before anyone jumps in, yes the thermo was blowing the correct way. I also have a territory and tried fitting the single fan an didn't have clearance from the water pump on a 302 using a 3 core radiator in a 70 mustang. As for standard wiring, depends where you pull the power from, you may need a relay, my one had one and the fan worked as expected.