AFR install - narrow band simulation wire

[tmontague]

He guys, I'm getting ready to pick what parts I'm going to purchase for my gauge installation this summer. I'm going with oil temp, oil pressure and AFR. This way if I run a cam con down the road I can determine how I should tune it until I can afford to get it pro tuned on a dyno.

Most AFR gauges come with a narrow band (NB) simulation wire that you can splice into the input line to the factory ECU so it will still run as normal without the stock narrow band sensor in place.

My question is: what wire do I need to attach that NB simulation wire to so that it feeds to stock ECU?

Also, is this possible (does it work?) or should I just keep my stock sensor in there and have an extra bung welded in to run my AFR?

I'd much rather remove the stock sensor as it would allow for a cleaner install and less sensors sticking into the exhaust. However, if this is not realistic if the afr sensor NB simulation doesn't work well to feed the ecu then I won't bother as I don't need any CEL's being thrown. If it won't work then I'll just keep the stock sensor in there along with the afr one that I'll be installing.

Thanks for the help