The 460 is excellent for durability an longevity. Can you really ever wear them out? I have 1 460 that is over 21 years old used an indusriall application thats got over 15,000 hrs on the clock and is running as good as it did when it was new. Thats a lot off miles. I have always said the two best motor Ford ever put in to a pickup were the 460 an 390. I know a neighbor off mine has a 390 in an old 72 that refuses to die. He bought the truck new an it is running great yet. But its a Ford and you expect that. If you look at the truck pulling circuit. Those motors are popular because they can take all the abuse they dish out.