So you have mechanical gauges for both boost and trans temp? Trans temp can be achieved by spinning your probe into the port on the side of the trans that points towards the front passenger side I believe, and I have no idea how an Edge could know trans temp otherwise. (Edge trans buster) Remember that phrase? I do...
For boost you just need a pressure line that reads backpressure at the intake manifold. That is all that boost is, a measure of restriction. More boost = bad, not good. Read a basic forced inductions book sometime. High boost is bad, not good, like adding a few more mufflers and cats to your exhaust...just plain stupid. Well at least if you have some basic grasp of how internal combustion/diesel/or most liquid fuel provided engine is operated, you would know this. If you have more questions feel free to ask and I will answer to the best of my ability. I am not trying to be a smartass, just to explain as simply as possible as I do not know your history.