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Are you trying to hook up a mechanical gauge or an electrical? Don't think I have any pics (probably the only thing I don't have a pic of) but if you do a search you will find some, I remember seeing them not too long ago.
From: FI Performance : Norwalk Connecticut www.FIPERFORMANCE.com
Cajun is correct on the valve, pull it. There is a -4 AN Femail to 1/8 NPT where you would use a double female 1/8 npt coupler found @ home depot. You can get the line through summit.
That's easy, you can use a very small flat head screwdriver and get it started. You can then unscrew it the rest of the way with your fingers. Option B, go buy a Schrader valve remover. About $2 at any bike shop.
Don't forget to let the pressure out of the fuel lines by pushing the valve in before you remove it.