Yes I agree, run a thermostat, try a 180 first. Buy a high cfm puller, I have the flex-a-lite black magic 150 and incorporates a shroud, very important. My temps when down 20 deg.'s. Also,
antifreeze will not help cooling. Add something like "water wetter" for lubrication. Check your timing also. Your temp should not go over say, 210 in traffic, on a hot day, if everything is working properly.