Originally Posted by
Empire
you technically don't need the harness and ecu, but if you have them/can easily get them, then why worry about swapping all of the sensors and crap around. Makes it a little more plug and play that way.
for whatever reason, I was also picturing the dohc manifold not the sohc manifold.
Truck engine harnesses are made into the body harness, and it all has to be cut and spliced to run a 240sx harness. Not to mention, the ECU sits under the seat not under the dash. However the ECU is swappable.
And the same applies for a frontier with a DOHC KA, the intake manifolds are easily swapped without swapping harness/ecu.