Side note?:
I can't believe anybody pays the stock temp gauge any attention, mine would show different readings if I changed the sending unit. I compared the temp readings with a mechanical temp gauge and just a 10* temp change would move the stock needle a long way, I would panic the first couple times I drive the car and the needle would move up to the O on gauge.
I mounted a electric gauge down on the bottom of the dash so I could peek at it if things got suspect.
The stock gauge I consider a 'best guess'.