Engine Temp LA 360

My recommendations in which I did just this same thing when my 340 was running close to 205 consistantly, Install a fan shroud and move your fan further back from the radiator and doing this will allow for more air flow over more of the radiator. I also have a 180 degree Thermostat and my 340 runs pretty consistant between 185-190 on a Hot and Humid day here in NW Pa
..