[J Persons]

You will also need to insure the gear on the distributor is compatible with the cam. Steel roller cams use a steel gear, and cast iron flat tappet cams use a cast distributor gear. There should be some documentation that came with the distributor as to what cam gear was installed. If you mismatch these components, the distributor or the cam gear will get worn to almost nothing, requiring a complete engine tear down and cleaning to get all the metal particles from the gears out of the engine.