Did it burn all the way to the dash?? I don’t understand why you need to run a new wire instead of repairing what you have.
Are you asking which wire is the ignition wire? If so look in the FSM schematic
The problem with a doubler and automatic is length. Lots of potential floor cutting and short rear driveline.
I would probably just draw up a adapter and straight to the splitcase and have the input shaft broached. Custom adapters are not really as monumentous of a task as they’re usually made...
Passenger drop Atlas and center a FZJ80 rear axle or a doubler to Split case and keep 60/80 axles would be the only options I’d consider for small tires (37”- down). I don’t see swapping to drivers side drop or different brand of axle worth saving on a transfer case that probably isn’t ideal for...
It seemed a appropriate response to your short vague question that seemed to have minimal thought behind it
@Morgan Evans is at least trying to figure out some actual tech info
Sure, GM 205 or just use the 60 split case like I do.