I pulled the stock cam out of the 4.8 I'm going to be using with boost and noticed the front cam bearing was showing a lot of copper.

Would it be usable? Or a good idea to replace? If it is just the one bearing bad would you still replace them all?

What are good cam bearings to get if I need to replace them?

Thanks

 

It's most likely due to the chain pulling down on it. My front was the most worn. I replaced all of them.