In looking around there was not that many install guides, especially showing where to wire everything too. Here is the steeps I took to install my gauge. If it helps one person, that's enough for me.
NOTE - You need a Torx Size 8 Screw Driver to take off the steering wheel cover, I found mine at Sears and you can buy the individual one for less than 5 bucks.
I decided to paint my Podi and Bottom cover Black since I have a Beige interior. I was not sure if I would like it so I used the remainder of the can of Plasti-dip from Another project to see. These were freshly sprayed.
Start by taking the kick panel off, it will need to come off anyways and will give you more room to work. Remove the fuse cover and the following bolts with a 8mm ratchet wrench.
Use the T-8 Screw Driver to remove the bolts here on both sides -
There is an additional T-25 Bolt on the bottom that must be removed as well -
Once all that is out of the way, move to the engine bay -
I drilled a small hole through the fire wall and pulled the wiring for the Sender through -
Instead of running the wiring through the ECU box I used this grommet behind the fire wall next to the brake booster, I drilled a hole through the grommet so I could re-seal the opening -
I used 3M double sided tape too secure the Boost Gauge Sender Unit, I found a bolt in the engine bay to slip the opening over to help it stay in place better. You can decide where you would like to mount yours -
My Location -
Next you want to install the Boost Tap. Remove the Factory Plug and install it here and run the vacuum line to your sender unit -
With that completed, I moved back into the wiring. On the left hand side of the steering wheel locate the thick black wire. This will be your 12V Ignition wire. I cut some of the rubber away to expose the wire. Wrapped the 12V Red Wire from the sender and then the 12V Red Wire from the Gauge. I soldered the connection to make sure it would stay in place and then wrapped in electrical tape. Use your multi-meter to Identify by turning the key from the off position to on, while on you will receive 12V.
For the CONSTANT 12V to the battery, I used this Red Wire. I repeated the same method as above and wrapped in electrical tape. Use your multi-meter to Identify. This will always have 12V regardless if the vehicle is running.
Once that is completed, wire the Orange Wire from the Boost Gauge to the White Wire on the pig tail of the Sender Unit Wiring, the Brown and the Green have NO function. They can either be cut, or you can do like I did and fold them back and wrap with electrical tape against the wiring harness.
Re-install in reverse order, but don't forget to test your gauge first! Enjoy you new set up!