This is a high-quality, exact reproduction of the original 289 Hi-Po harmonic balancer, made from the original Ford blueprints and identical in every manner with the exception of the Ford markings. Cast from high quality iron, fully-balanced and packaged in a box with the part number of C6OE-6316-A on it. This balancer is correct in appearance and will bolt onto any 289 Hi-Po engine from 1963-67. It will also fit any 289 with a standard 28 oz external balance to give it the 289 Hi-Po look. Will accept 3 bolt crank pulleys.