Cant cool my 5.9 magnum. Radiator size or add one thing else?

I've had quite a few friends and a couple mechanics tell me that these newer engines are designed to run about 205-210 degrees for the best performance. I still have trouble getting use to higher temps on these but so far I have had no trouble with the way my magnums run and preform. I have a 96 and a 99 magnum and currently installing a 380 hp 360 in my Scamp. Good luck