Edelbrock will suggest adjustable rocker arms so you can get the correct preload. Most likely you will be okay with what you have unless your old combination had excessive milling done.
Edelbrock claims they are bolt on ready bit the quality of the assembly is lacking. Most builders will tell you to check the valve job and guide fit along with checking the springs installed height.
These are some of the reasons several of us are assembling Sidewinder heads with quality work and components so you truly can just bolt them on and go.
Keith