Professional Products Harmonic Dampers for small block Ford are nearly indestructible. The Ford units are the most universal dampers in our line. Just two part numbers fit every small block Ford engine ever made when used with the optional spacers. The two dampers are identical with the only difference being the size of the counterweight.

Note that the 28 oz. in. and 50 oz. in. numbers assigned to the two weights are not the actual weight of the counterweights. Actual weights are much higher.