I put headers and electric fans on the Blazer. On the new heads the temperature sending unit for the dash gauge sits right in between two of the head pipes. My temp is running at about 240 degrees according to the dash gauge. Is it possible that I'm getting a higher than actual reading due to the sending unit being positioned between the two scorching hot exhaust pipes? I replaced the thermostat thinking that it was stuck shut. New thermo and my dash temp gauge still has me running at about 240. I'm having no signs of overheating other than the dash gauge. It never gets on the red but damn close. I'm afraid I'm frying my new rebuilt motor. Half the time I'm driving with my electric fans manually turned on and the heater blasting to keep the temp gauge at 210 - and it's winter!