For those that asked about the gauge, it is a VEI Systems gauge.
SUPER high quality, US made, and awesome support.
Reasonably priced too. The gauge and both sensors ran about $150 shipped to my door.
The gauge has adjustable high and low warnings for both oil psi and water temp, adjustable brightness for both key on and key on headlights on, and you can even switch the gauge readouts, top to bottom. All using the one button on the gauge!
So far I really like it, and it seems to be spot on for readings.