I was running OK but in this heat I am running about 220 or so running down the road at 70 mph. Its 100 plus degrees. So I am not sure if its a bit high because of a circulation issue or just the high outside temp. Thanks for any help. Its a 1980 301 rebuilt about a year ago. I had the radiator removed and cleaned by a radiator shop, Seems to be half full in the res. of coolant.