I have solved my mystery leak! Turns out that it was a pin hole or slight leak in bottom radiator hose. It would not leak when running or at least I could not see it. I parked the truck and placed card board on ground and low and behold I noticed a drip on the inner fender well. If it set all night there would be a spot the size of a basketball on the ground. No over heating, just the normal 210 to approximately 215 to 220 degrees when the fan kicks in, but the smell of anti freeze was apparent. I also replaced the thermostat also while I was at it. Easy fix but parts seemed a little pricey, $29 hose $27 thermostat. Bottom line its fixed, Hope this may help someone with similar problem.