I'm new too......where are you mounting it? Steering column? I was toy'n with replacing the stereo with a single din, and using the bottom extra space to make a 2 holder gague display......Grab Boost/EGT
This is what I used to install in my LGT's it might help you get the concepts down, DON"T follow it though, wires will most likey be diff colors and everything in diff locations.
I mounted mine on the column, and ran the wires to the fuse box on the drivers side interior dash. use a multi meter to find a blank fuse holder with constant 12 volt (with the key out of the ignition), then hook into that useing a fuse with a wire coming out of it(buy them at any autoparts store) do the same thing for the acc 12 volt line with another fuse blank.
Note you will need 2 fuse with wire extentions. 1 large, and 1 small.
this is what the head technician at my dealership told me to do to keep from voiding the electrical warranty, since you are not hooking into any existing systems.