Does anyone know where to tap for the trans temp, oil pressure and A/F ratio sensors?

You need to add a few details to your question :p

Sorry, I know it was kind of vague. I was taking for granted that most people that had installed guages before like myself would know what I meant.

I'm looking for the locations of the oil pressure, and trans temp senders, as well as the proper harness of wires to splice to get an air/fuel ratio reading.

that wasn't vague at all. If I knew where those things were I could tell ya lol

What I meant is that you didn't say what type of engine was in your vehicle

It's the 3.9