Find a hose that comes from your intake manifold. Cut it, put a T in it. Then run hose from that T into your dashboard. Mount the gauge somewhere and attatch the hose to the gauge.
The gauge i got had no mounting hardware or any threaded inserts to mount it anywhere. I used a hose clamp, stuck the gauge through the board which its attatched to... then put the clamp on the gauge behind the board to hold it in place.
Thanks Brian! What about the electrical portion? You know, so you can see the gauge at night. I have to do this now. I know you should attach it to a 12v wire somewhere but you can't just tap any ole 12v wire. It has to be a wire that turns on when the lights are turned on. What did you use? (I'm asking you this as a child would or someone not in the know).