I am interested in a gauge for my air/fuel ratio. What do i have to do to the car so it will work properly? Should the kit come with these parts?

 

Most A/F gauges need an aftermarket (usually sold under the same manufacturer as the gauge) O2 sensor, so you've gotta cut a hold in your exhaust somewhere to mount this O2 sensor, which will be wired directly to your gauge. The aftermarket O2 sensor's function is solely for the gauge- it has no link or effect on the engine's O2 sensors...

 

The AutoMeter gauges can connect by tapping into the stock O2 sensor signal wire, somewhere between the pin on the PCM and the harness connector at the sensor (not directly into the stainless steel sensor wiring). Pin C20 (purple/white) for the driver's side, pin C8 (purple) for the passenger side. Many aftermarket (narrow-band) gauges can use a "standard" O2 sensor as a source. As noted in my response to a similar post on another forum, the value of the data is limited.

 

I installed an Autometer A/F gauge, and, wired it to a 3 position double pole toggle switch. Right and Left side O2 factory sensor was wired to each purple wire on the O2 sensor connector (female side for easy O2 removal). I installed the switch in the kick-plate under the steering wheel so I can switch between bank 1 and 2 while driving (I picked this technique up from LJ). I used one of those "A" pillar gage mounts. I also have a wideband O2 sensor (Dynojet on bank #1) on the A pillar. The narrow band sensors don't tell you much, but, with the wideband, you can compair the narrow and wideband analog outputs and learn from that. The wideband has allowed me to tune the PCM (Low speed and WOT fueling). Also, you can compair Rt and Left narrow band sensor activity/ ouput while driving.
Hope this helps. (1997, 383 LT1-D1)