How hot is hot?

In my 67 Barracuda, I have a newly built 340 motor (stroked to 408) with Edelbrock heads, 10:1 compression, champion aluminum radiator with dual electric fans. I took her out last night around the neighborhood and the temperature got up to about 220. I got nervous and brought her home. After I parked, I noticed the electric fans were definitely working overtime to cool it down.

Should I be concerned?