The Sierra 18-5404-1 Rotor is interchangeable with the following: Chris-Craft 16.69-00149, Chrysler 868096, Crusader 20223, GLM 71040, Evinrude/Johnson 982211, Mallory 9-29207, Mercruiser 391-5088, 391-7057, 391-898253029, 8M001224, FI6900149, OMC 982211, Pleasurecraft R103001. Each Sierra product meets or exceeds the original equipment part it replaces. Fits: Ford & GM V-8 Engines With Mallory Conventional Ignition. Fits: All Mallory 1998 & below.