i debated the LS4 swap...waste of time and money. L67 or L32 is the way to go. for the LS4 it uses a CAN bus not OBDII so you must rewire EVERYTHING, BCM,TCM, everything, total waste in my opinion. especially with no aftermarket. the LS motor is meant to go one way and thats RWD. thats like a girl with big boobs getting a breast reduction, you dont slap god in the face.