If you have a B&M command flo (fuel pressure regulator), click this link:
http://www.prostreetonline.com/pso/p...p?articleid=10
here's what a fuel pressure regulator look like. It's on your fuel rail:
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The fuel pressure gauge is simple. Find your fuel filter and unscrew the banjo fitting on top. Place the gauge on top and use the fittings it came with. Yours and mine is on the same location.
Look at this picture on the right side of the battery and you'll see a gauge. Mine is NOT a normal install since I have another sensor T'd off beside the gauge for another fuel pressure gauge that is read remotely.