I wired both the AEM Truboost and Wideband o2 to a constant 12 power source. I found the source using a simple multi-meter. I wanted the ability to manual tune the gauges off instead of running off of the ignition, so I ran power through a switch that I installed as cleanly as possible. The gauges are bezeled into where the OBC would have been on this car. The OBC was pretty much useless with a ton of dead pixels. There is still room to add a gauge and I'd still like to make another backing plate to hide some of the voids and wires, but good 'nuff for now.