Were all the necessary mounting points already welded onto the chassis or did you have to weld it on during conversion?
I guess you will have to route wiring outside the loom, and fit warning/pilot lights outside the speedo console since trying to modify the the standard wiring loom is perhaps too risky.
(I was involved with doing a similar modification on a Hardbody, and there the 4x4 loom differed from the 2x4 loom. The loom plug going to the dash had a different number of connectors as well.
Also, the Nissan 2x4 chassis differs slightly from the 4x4 chassis, requiring the welding up of mountings).
When you are dead, you don't know that you are dead. It is difficult only for the others.
It is the same when you are stupid.