Just a tip: You can buy an inexpensive mechanical oil temp gauge, and have a machine shop make you an
oil pan drain plug, with a hole in the back of the drain plug, that allows you to screw in the oil temp gauge probe.
I think the machine shop I used charged me $50. I just gave them a little diagram with the necessary thread sizes.
No need to weld a bung hole in your oil pan! There will need to be a hole the length of the plug, so oil can flow to the sensor.
You can also monitor tranny temp the same way. Assemble a bronze T from your hardware store, with one leg
to allow screwing in the temp probe, and the other two to allow tranny fluid flow. Install with some tranny line
rubber hose right after your tranny cooler outlet Make sure its tranny rated rubber hose. I think recommended max temp for
the return fluid from the cooler to the tranny is about 165 degrees. The stacked plate tranny coolers are much better than the
brass tubing with fins style, or your radiator. I used an electric temp gauge, because the probe is smaller. You have to ground the
brass T with a wire.