I want to hook up a fuel pressure gauge to monitor my fuel pressure on the setup below. I would like to be able to receive the readings from inside the car. Basically what do i need to buy?

 

If you have a service port on the fuel rail that is a threaded-in fitting, you can add the gauge sending unit there. I guess you could even remove your rail and have it drilled and tapped for an 1/8 NPT fitting. A good Auto Meter electric gauge will run about $200, and will come with everything you need except extra wire. Just power it up and run the sender wire to the gauge.