I'm almost finished dropping an SIR motor into my GSR. I only have to pretty much mount the header, axels, fill fluids and start her up. I was going through the things I needed to do and It just hit me. Since the motor and tranny are off a SIR where it's a right sided car. Are the shift positions different? meaning now that the tranny is in a USDM left driven car will first gear be in a different position??