I also agree that he does NOT have an overheating problem. He isn't running hot while moving and only while stopped. Our old cars just run hotter at idle, and during stop and go, and it seems hotter than it is, or could be.

I run two gauges. The factory gauge, and an Autometer gauge. I use the second guage to measure against the original gauge just for piece of mind. The Autometer gauge I believe is more accurate, and the original gauge appears to measure higher temps