Donzi,
HP Books puts out a manual which has been referred to several times on this site. Its called Big Block Chevy Marine Performance. Its very easy to read and gives good explanations for different aspects of motor applications. It goes into detail as far as referring cams based on your application with cam specs and manufacturer numbers. I finally went out and bought it and was glad to learn from it. I know telling you to go buy a book is not a great response, but there is good info to be had in the book.