Is there no way that u can use the original b16a harness in this swap, ive searched all over and come up with nothing, the only reason i ask this is cause the harness on my engine is mint. Cant you just plug it all up and re-pin at the ecu?

 

aslong as all the plugs fit into the correct spot (RHD wiring in LHD car?) you could re-pin the main plugs to match the car.