You dont have to really mate the two harnesses. Strip the original harness down to the bare bones needed plugs like oil pressure sending unit, starter wire, fuel pump, positive leads, grounds etc. Remove the remaining unneeded wires from the original fuel injection system, maf, etc etc. Swap over the sending units from the original motor to the 6.0 and then you can just plug in the trucks original harness connectors to the sending units and have all your gauges and stuff working. add some positive power to the 6.0 along with grounds and you should be off and running. I havent tried tackling anything 4x4 yet so Im not sure what you will need there but I would assume you would need to salvage the original wiring from the original harness.



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