Gauge Pod questions

[1Ton-K1500]

Installing a gauge pod with trans temp, vac, and air/fuel gauges. trans done, looking for help on the vac and air fuel. The a/f gauge says i need to tap into the o2 sensor feed wire from the ecu, and i dont have any books or anywhere to look, so does anyone have an idea where i can find the answer or know which wire it is? The vac gauge just needs to be tapped into a line, any suggestions? Thanks and this is all going onto a 97 k1500 4x4 engine code R

[Botan]

A/F is pointless on a stock sensor. you need a wideband sensor to get accurate results. plus this isn't a honda civic. You're gonna need two widebands, and two gauges, (one for each side of the exhaust)

[Jon4x4]

unless you have a y pipe

[1Ton-K1500]

The a/f gauge instructions say to tap into the O2 sensor Feed wire at ecu, so wouldnt that be the one that sends all the info to the ecu? I know for the wide band i would need two of everything being true dual--no y-pipe.

[Botan]

if you use your factory narrowband o2 sensor, your gauge is basically just gonna be a light show. It will be too erratic and will go off the scale both ways.