Temp sender wire voltage?

[Custom/Ten]

Hey guys what should the voltage read on the green wire to the temp sending unit? My gauge reads low, I have a new thermostat that opens up at 195 as it should, I have a new pcb on the gauge cluster, I have a new temp gauge from lmc and left the resistor off like the directions said to. I have a new sending unit (tu5 dura last) which I read is one of the ones that work on the 67-72s cause apparently some dont work right. The voltage at the green wire is just over 8V. Is that right?this is still as high as the gauge will go.