I have a 1971 Mercury 650 4 cylinder with the wiring going from the stator to the rectifier dry rotted. I also have a 1968 650 4 cylinder that has a stator with good wiring. I checked the part numbers for the flywheel/stator for the year models and they are different. My question is if I use both the stator and flywheel off the 68 model on the 71 model will I be okay? I don't know if the flywheels on these motors contribute to motor balance and don't want to mess thing up. Thanks Mike