Magnum wiring help

I have done the Google more times than I can remember.
I always end up with information for wrong year, non-injection. No overdrive..
Or use all the wiring from the truck.. front to back.
Lots of people mention that this is a simple system. And only a few wires are needed.

I may be able to figure it out, but if someone already knows.. it would probably save me a few weeks.. as I usually work every other weekend, 12 on 2 off..
Does not leave much time.. but those 2 days I like to get some work done on my stuff..