Cooling ?s
It was 85* in Michigan yesterday? lol
I wouldn't be nervous at 220, but that's just me. But, I run a 180* stat and on hot days like yesterday mine runs about 190* when at cruise, turning about 2600 RPM.
Steve has a point on the hood to core support seal, if you don't have one, it allows air to flow over the core support, over the top of the rad, and less going through the rad at cruise.