Why wouldnt you want it to read at the hottest spot? If you are trying to get the gauge to read cooler, put it in the trunk!!.

You shouldnt care about the cooler locations, the hottest is where the damage could be done. The head is where the factory picked because it is representative of the hottest temp. Later, it was moved to the intake because it gives a averaged temp of the water exiting the block and heads AND the sender is a little more protected.

A similar thing happens on transmission temp gauges.... people put them at the output of the cooler....we had one guy here at work that said his transmission temp never got very high...duh, he had the gauge at the exit of his cooler.

my opinion, for what it's worth