Motorcycle Repair: Evo Hop up, roller rockers, push rods

Question
I bought the Edelbrock Performer kit. It includes heads, pistons, cam, push rods and all the gaskets. I also bought a Mikuni 42 kit and S&S lifters and S&S roller rockers. Ok, I think that is all the stuff I bought. I have done a lot of the maintenance on the bike and I enjoy getting into it. I am concerned about replacing the cam. I was told because the current cam Andrews EV27 is going to be switched with the Edelbrock cam which has a 600 lift that I will need to make some internal adjustment. I was told the cases will need to be cut for clearance of the new cam. I'm not sure on cutting the case and what else I need to do.  

Answer
Yep, you will probably have to make a cut in the case. It takes a special tool to do this. The problem you will have is clearance for the rear lobe. You might be able to take the cam out yourself, take the bike to a shop and have them take the cut, and then you finish the work.
Good luck with your project
Mike