Probably easiest to find or make a "T" that will snap right into the quick-connect between the fuel rail and supply line from the filter on top of the engine and hook the gauge there. The other possibility is the Pressure test port at the Fuel filter at the front of the tank. This is a fitting with a schrader valve in it, I don't recommend this because of the location and it may be difficult to keep it leak-free on a fitting like that.
182,000 and counting. Superchips 2914 Tune, NAV upgrade.