Is this the correct book for small blocks?

Although I do not have personal experience of that particular book; in the past I have found books printed by S-A designs to provide adequate information. In my experience, I read everything I could get my hands on. The Mopar Performance engine book is an excellent source, as is "How to Hot Rod Small Block Mopars" by Larry Shepard. You can't know too much, reguardless of what it is you are building/rebuilding. Put pen to paper, write out what you want, it helps to clarify your ideas, then you can study your reference book(s) to acheave your goal.

Good luck