Tim S & S told me I need to change the springs, and the roller rockers would really help but to get what the cam can do I needed to bump the compression, they said the cylinders are a little long due to emissions and that at T.D.C. the cylinder and the piston needs to be flush... to raise the compression. thats the only reason I haven't got into it yet. Oh yea a new programmable EFI (EFI bike)... let me know what else you run into.. mike
S&S rocker boxes and roller rockers, your springs are more than likely already have the red stripes. You'll need to re-jet also and pipes if you don't already have them....
Just got off the phone with S&S. They reccomended changing to S&S rocker boxes and roller rocker arms. He did say the springs could handle up to a 600 cam. Also reccomended I zero the heads.