Ok I found the pictures of teh firewall and where I went thru it..
And here is the innovative A/F meter install..
This system is rather involved.. Just for the A/F you have, the wideband oxygen sensor, the sensor control box, and the gauge itself.
The BEST thing about the Innovative one, is they make a lot of other items too. All the sensors they make are connected thru a serial network!! I am a computer nerd, to to me that makes it really cool

To add other sensors, you just need to plug them in the network. More on that later.
Here is where I went thru the firewall, and you can see the sensor control box.
closeup before I zip tied it up nice and tight..
and it all zip tied up..
You also have to have the sensor installed in your exhaust. It comes with a "bung" that has a plug, so you just take that bung to a muffler shop and for aabout $70 they will drill the hole and weld the bung on there. At first you plug it with the plug, cause you need to have the sensor powered at all times when the car is running.. if it isnt you will permanently damage the sensor. So I get under the car and go to screw the sensor in after I mounted the sensor box and gauge.. and the guys at the muffler shop didnt get the bung lined up with the hole!!! I was livid to say the least! Anyways.. I got out the dremel and luckily had a grinding stone that was almost the exact diameter as the hole. I put it in the hole then turned it on (because I didnt want to screw up the threads on the bung). The dremel made short work of the exhaust pipe, I was VERY suprised. It was all of a couple seconds and the dremel ate away the part of the pipe that was in the way. I then screwed in the sensor and connected it to the sensor control box.
Next post is on installing the gauge itself..