As said earlier, Timing and A/F will also effect temp. more enitial timing will make you run hotter at idle. Leaner will run a little hotter. Does it cool down while on the freeway? If it does, then you have a fan issue. If it stays hot (or gets hot) on the freeway, then you have a coolant flow, or radiator problem.

With all that said, it does not suprise me at all that a 440 running a 22" radiator is having issues.