89 Fuel Injection Harness Removal ? Any Pointers?

[1972C10]

I am about to remove the Fuel injection setup off an 89 C1500W/T Any pointers to make it easier I looked it over today looks like the big bunch of wires go trough the cab an hook the the ecm but there are some wires going towards the drivers side of the truck that plug into the harness im assuming these are for idiot lights etc. I need to get all the nessacary componets since i am getting rid of the shell .

Under the hood it apears that the large bunch of wires coming from the ecu join into a smaller bunch about the size of a quarter that go to the fuse panel I havent taken the loom off the only engine function in the smaller set i see so far is the O/2 and it apears to be going back towards the ecu Do i neeed to unplug this from the fusebox ?
The wipers and some other non engine items are in this set Im sure i will figure it out once i remove the loom and see whats going on

I was plannin on marking certain things with masking tape and a pen.

Im hopin its a straight foward unplug everything type of removal but im prepared to have to solder in some stuff when i reinstall it.


Any suggestions would be greatly apreciated.