My 65s has been in for at least 15 years.I use 69 C body masters when I change.I started with a 67 master and drums.When I went discs I used the C body.My kid has the same master on the 62 300 and the 66 Charger.No problems at all.If you go to the aluminum master the rod needs to be longer as you use an adapter.Make sure the rod locks into the rubber insert.Rocky