This is a high-quality reproduction of the original 428 SCJ harmonic balancer (original part number C8AE-6316-C). It’s made from the original Ford blueprints and is identical in every manner with the exception of the Ford markings. A fully balanced, new replacement unit that will eliminate the old balancer with dried out rubber which allows the timing marks to move. The 428 SCJ balancer was unique to this engine because of the heavy duty connecting rods used in the rotating assembly. This will be correct and will bolt onto any 428 SCJ engine from 1969-70.