Correct cam and distributor gear combo

Cast iron crate roller cam, regular gear, tappered hardened tip and pinned gear is the mp version. And it's for the high volume pump or a high rpm application.
Crane Coated steel gear works for billet steel cam cores. I use one.
Bronze is the old way. Bronze is also for billet steel core cams but wears over time and the particles go I to your oil and a magnet wont catch'em.