The only thing i would think you would need 2 do is get the ecu mapped as the engine is the same model and should fit straight in the (TwinPort) is to do with the injectors. Ie Twin Spray if you like instead of a single spray from the 2002 engine its 2 just get a finer mist of fuel in the engine. or you should just be able 2 put the injectors from the 2002 engine and remember to put the fuel pressure regulator on aswell (but this may not be nessasary because of they could both run the same pressure).
Hope this help's.
Ian Hatch., March 2009
