I have a stock 72 3kc w/ 4spd and 4.22 gears. I disonnected the leaky heater core and redirected it. Put 160 thermostat, flushed radiator, new radiator cap, not running lean, timed right, no leaks. Problem is on the freeway it runs about 225 to as high as 240. I dont go over 65, and I drive it pretty easy. Only seems to do this when its warm out too, under 70 it does ok. Otherwise about 195-200. Question is: What is a normal temp running range for this, and is there any thing I am missing to fix? Any help would be appreciated since I am having lots of trouble finding info on this engine.