The guys discussed about the proper way to hook up your sungages before on here, so you get the proper temp reading.
Deppending on how or where you hook it up, you will get differant temp readings.
Also in my old cars I like to run the water regulators instead of water thermistates.
You can get them from alot of speed shops or order them from summit.
You'll get about 3 or 4 to a pack of differant sizes which are differant temps.
It just slows down the water to allow it to cool but never stops the water flow like thermistates do.
They have always worked very well in my old fords.
Kurt