Hello, I have Apollo 1974 V8 350. The engine has a vibration and i can feel it in the whole car and in my steering wheel. I changed the Harmonic Balancer and used 1977 Regal. even it looks differ than the one originally was in the car, the vibration still. People started to tell me each Fly wheel has its special Harmonic balancer. and some of them said it is from the Torque convertor. I am from Syria. Is that true that each that fly wheels has different Harmonic balancers?