I bought this book. Although I don't agree with everything he does, it's pretty thorough, and has good pictures and explanations.
www.hobbyobsession.com/bjsbook.html
There is also this book, they pop up on ebay all the time. It hasn't been updated since 1972, but has a lot of good theory. There is talk of getting permission to reprint and update it with current parts listings.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=6762&item=7934896516&rd=1&ssPageName=WDVW