there is alot of write ups on converting an RS to WRX but its usually in a GC body, is the swap as extensive when useing a GD RS and a GD wrx??
Yea, we threw the bulkhead harness from an '03 WRX into Deride's '02 2.5RS. The under-dash stuff was almost entirely plug-n-play. The wiring from the back half of the car is a bit different due to the fuel pump and it's controller. we opted to modify the RS one, wasn't too bad. only ~8 splices there. He'll probably remember the specifics better.