where is the best place to install the water temp. sending unit... the head or intake???
I have been told tht the intake will be 20-50 degress cooler than the head actually is,
and if you put it in the head the sending unit will asorbe the header heat at slow or idle speeds giving you a flase high reading!!!

so I am really confused!!!!!!!!!!! i just want the most accurate reading so I do not fry the motor.

also what is highest safe temp for a motor at idle.

I have a 454bbc that is running 225@ idle with a electric sending unit in the head. is that too high or is it alright?????