Is there a better location for the temp sender (1955 292 Tbird, 12 volt)?   I've had the gauge pegged VERY HARD to the right, physically it could not more any further right.   The car didn't boil over.  An IR temp gun top tank was at 210 degrees.  It ran OK, but I could feel a slight degradation to the idle from the under hood heat.

The gauge and sender in my car are from Casco.   They are a matched pair that operates at 12 volts.   I think the problem may be the location of the sender.

I would like to see something with a more useful scale.   I don't feel like I would have any clue if the radiator will boil over or not