Over Heating

I have a 1968 barracuda with 440 running two fours with new 26in aluminum radiator in it with two 10in electric fans 2300cfm each on it having trouble over heating on me sitting still it runs about 200 degrees going down the road it will go to 225 to 260 degrees sitting still is this running to hot sitting still. Someone told me to run electric fuel pump on it that my help it to run cooler is this true?