Anything goofy on the motor, like a chrome fan shroud, or lack of engine bay seal?
What oil cooler do you have? Some of the aftermarket alternatives, like EMPI, just aren't as efficient as the expensive ones like Setrab.
Make sure you've the right sender/gauge combo. Too often I see a mismatch there, which gives false readings.
If you are 100% sure that 220 is your accurate oil temp, And you have a good quality oil cooler (like our stock Setrab) then you'll need to start looking for a physical cause. I've run aircooled with a simple Setrab single fan pack and once the cooler fan kicks on, oil temps drop to 190-200 and stay there...
You don't want to see anything above 235, but damn Im surprised you have such high temps with such a low ambient and such low CHT temps.