I did it the simple way. I had a donor truck the same year as mine when I did the zf swap. There was a limegreen plug under the brake booster on both my automatic truck and the zf truck. I unplugged this on both trucks, this is the tranny/transfer case harness. The hardest part is getting the wire holder loose that is on top of the frame rail. Took my automatic harness out, plugged the zf harness in, and that's it. The zf harness has the jumper for the neutral safety switch and everything else matches up, including the different sensors on the manual tranny. Plug and play, no wiring diagram needed, no spliced wires, etc.