I want to install crane 343901 cam, I was at crane website I think and it mentioned machining the head with some tool I couldn't find in the searcher. What are they talking about? If I switch to this cam can I keep the same rocker assembly I got on my 390 now?

 

That is only required for installing their valve stem seals. Your stock seals will work. You rocker setup should handle it.

 

good to know, thanks. Ive only yanked a cam out before other than that... I'm oblivious to cam knoledge