The only way to tell what your real temp is is to either shoot it with an IR gun (easy way) or put an oven thermometer in the swirl tank, start the car, and let it slowly heat up. Don't rev the engine much or coolant will spill out of the swirl tank. Compare the reading on the oven thermometer to that on the temp gauge to have an idea of what temp equals what...
Oh, and the sending unit should go in the block, not the intake. The intakes are dry so there shouldn't be any coolant going through there!
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