This book by Joe Abbin of Roadrunner Engineering helps lay the foundation for your next flathead project. Although it’s undoubtedly a technical manual, the 184-page book’s primary focus is to get your flathead to perform better than ever. Along with useful background information and engine identification insight, the book points you in the right direction about what parts to use from the crankshaft to the sparkplugs. And once your engine is finished, Abbin has included tuning tips to make sure your motor runs well and stays cool. As an added bonus, he’s provided excerpts from the original service manuals as well as a list of references and resources.