Plug it into the power drop, then solder to the accessory wire and the ground if you want. Pretty simple. Pull out the compartment in the glove box and locate the power drop behind it.

o ok, so it becomes like the radio harness for an aftermarket radio?

Sort of. Just three wires.

ok..and the volt gauge just goes to + and - on the battery right?

Tap the sender wire for the volt gauge into the 12v switched wire in the power drop, otherwise the gauge will draw on the battery when the car's not running..
Also, the Air Fuel Pigtail plugs into the oxygen sensor harness in the engine bay, to provide a place to hook up the sender wire for your A/F gauge. Hope that helps!

yea, i think i get it now...so let me give a runback:
boost-vaccuum line under snout
volt-12v switched and ground
air/fuel-12v switched, ground, and sender from O2 sensor

-all lights are tapped into switched power and ground?

Here's a write up on Lighting Your Gauges

yea, i didnt really want to tap into the dimmer...could i run it from the drop or no?

Yah. I ran two gauges off the power drop. One started dimming, so I found an alternate source. But it still dims, I think it is the gauge itself not lighting up properly. AustinGTP has three things wired to his powerdrop. Just wire them all there until the fuse blows, or the lights aren't bright enough on the gauges.

ok, thanks tons for all your help guys!
ill post pics when the gauge pod comes in and its all finished