My truck has been swapped (by a previous owner).
I can tell you they took everything from a frontier (ECU, Engine Wire harness, sensors, valves, engine, transmission, exhaust) they did splice in the dash wires, AC and likely the fuel pump. The only issue I have is the Tach is off by a third (4 cyl to 6). Some of the choices they made when it was installed caused a few headaches when I did the SAS but for the most part they did a good job. Some people will tell you it's not worth it for a small WOT HP gain....but the drive-ability is vastly improved over a stock vg30 or 33.