Cam AND ROCKER HELP NEEDED PLEASE!

I am using stock heads with stock pistons. I found a really great deal on a 71 318 that had less than 20000 mi. The inside of this engine looks like new. Therefore, I really hate to get too deep into mods. Thats why I am keeping the stock parts. However, I am going to use your idea of a mach shop to check the set up for these heads. Thanks guys!
Brian