How to Identify Crankshaft Dampers (Vibration Damper) (which ever you prefer)

                                                    The 383-440 steel crank bal is on the left and the 400 cast crank is on the right.

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                                          The 440 cast crank bal is on the left and the steel crank is on the right.

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                                                      Front and back view of the 383-440 steel damper.    (A 440 Damper is illustrated)

                                                    This pic shows the difference in the snouts of the bb and sb dampers.
                                                    The bb is on the left and the sb is on the right.

                                                                 This Information copied from www.Moparts.com