Because I also thought about picking up the water temp here at the supply for the intake but seems like the metering block would be alot of weight hanging on such a small fitting coming out of the block. I guess I could make some kind of support bracket and mount it to the bell housing bolts.
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A temp sender fitted here is likely to 'cycle' showing thermostat open/close events oscillating between a lower and a higher reading as the thermostat does its job.
I think that the stock location was designed solely for a 'pull over now' idiot light.
The beauty of instrumentation is that one can measure as much as one sees fit.
BTW. Your setup is over the top pretty. I love all of the details contrasted by different colors.