Yes the yellow paper is the big white plug front and back
basically wires 1-45
I am not sure if they are in any order
I started with the larger gauge wires and listed their color, circuit number, and destination
The circles are apparently wires not needed
some of the other numbers and such will just be chicken scratch that pertain to our swap
This was a 1984 Ranger that got a 92 dash and 4.0 and then eventually we went back and did a very powerful v8
It is the closest swap I have to what you are doing
BUT
I also have all the info for 84, 86, 87, 88, 89, 91, and 93 trucks so if you need anything else I can look it up
If I was there with you we would lay out the harness, quickly identify each wire, where it goes and why. Then eliminate everything not needed, cut them short, then come back and un pin all un used wires from the connectors.
If you want me to send you any pics direct to your email or phone just PM me
Hope this helps!