okay, so i got an AutoMeter Carbon Fiber AFR gauge from a friend for pretty cheap, and my mounting cup for it just came in, so it's time to mount it. i've already figured out placement, i just need to know how to wire it in. i was thinking run B+ from the spare fuse in the inside fuse block (what is it, #21 or something?), and ground is easy, but anyone know what wire i need to tap into for my o2 sensor reference? i'm thinking ChevyMgr would have the best info on this so i'll toss him a PM referring him to this thread, but i thought i'd throw it out to see if anyone eles knows anything. also, anyone know the easiest way to get under the dash to route my wires to where they need to go? any other suggestions in general for the install?