Your temps are just what I would expect to see, but not the way you have chosen to break in a new engine.
I like to run a new engine (with the car parked) up to normal operating temperature, then shut it off and let it cool to room temp, then repeat this process 3 or 4 times at a minimum, then recheck the head bolts, then take it for short easy drives around the neighborhood. Vary the speed but not over 35 or 40 MPH for the first few hundred miles.

This works well for me.
Be sure to recheck the head nuts until they stay at 55 pounds torque.