87.5 CGT question

[ben swann]

I'm trying to make sure I am using the correct sensors on the cooling
neck of my 87.5 NG engine which is now installed in an'87 4kq.

I purchased a sensor for the NG 87.5 GT COupe NTC Thermo sender, but it
does not have the same thread size as the one on the bottom of the neck
off the 4kq.  Not sure whether I have the right cooling neck.  The
thermo sensor/sender for the NG was black and the one for the 4kq is
white.  The NG replacement would fit in the top port, but then I'd lose
the temp guage.

So I am trying to find out what is supposed to be on the cooling neck
87.5 GT engine.

Ben