Uh, the hardware isn't - the series 1 shares transfer case, driveshafts etc with the R33 GT-4 (and that was only ever released as NA, not turbo so the engine and stuff is fairly different to the RS stageas) so I think it is a little more complicated than that. Not to mention the amount of places it is possible to fall over on, in regards to the ECU, just like Duncan said.