I wanted to rebuild my 390 and bought this book to help me with that adventure. I was sorely disappointed with the outcome. The book lacks any real instruction and serves as a general overview of the breed - Ford big block motor. There are some photos but nothing that is useful in rebuilding or repairing other than photos of placement of accessories or other things. If you are attempting to build a BB motor look elsewhere with regard to instructional manuals.Thanks for reading my review.