Well I decided to scrap this project. My Supra is an '82 and I have been unable to get some of the signals I would need like the fuel level. This really sucks because I put a crap ton of time and money into this. If my Supra was newer with an ECU, I could have tapped into that with a custom passthrough plug. I had some cool stuff going with it too. The speedometer (GPS) was working great. I even had it flash the background of the speedometer red when you exceeded 80 MPH. There are some limitations as far as using the Raspberry Pi as a web server. It was overheating because it was constantly looking for new values. It also drained my battery if I kept it running. If I didn't keep it running, it would take a couple of minutes to boot up completely.