I am running a 350 , have a shroud with electric fan . I changed out the stock intake for an edelbrac performer about 2 months ago , inside of motor was clean then . I ran a 180 thrm. and switched it out for a cooler one for next summer . Now I'm guessing it is running too cool to burn off the moisture in the oil ?! causing the milkyness . I suppose the only way to make it work correctly is to buy a radiator that works correctly . I was hoping maybe for a quick fix in something as simple as a hotter thermostat and a pressure cap .