I am posting this for a friend of mine:

I am planning on putting Crane's Powermax roller camshaft (.509/.528 lift) with the Retrofit hydraulic roller lifters in my 67 Camaro and wanted to know if i need to "dial" in the cam. In the installation instructions it says something about camshaft buttons and dialing it in. someone explain this to me please.

 

you should dial it but it is not manitory as for the button it's used for cam thrust (forward and back movment)and is required.