Ford Flathead Engines: How to Rebuild and Modify

Get your hot rod back on the road by rebuilding its Ford Flathead engine using this comprehensive guide that features expert advice and detailed step-by-step sequences.

In Ford Flathead Engines: How to Rebuild & Modify, author Tony Thacker and flathead guru of H&H Flatheads, Mike Herman, take you through rebuilding a flathead. One of the most important steps is to actually find a good, usable core; many have been sitting for a very long time and the engine design is prone to cracking. Running changes are also an important consideration when selecting a core and include the cooling system, ignition, and transmission mount.

After you have selected a core, Thacker and Herman take you through the entire process of a rebuild, including teardown, parts inspection, machine shop processes, replacement part selection, reassembly, start up, and break-in.

Although not the first V-8 engine ever produced, Henry Ford's side-valve V-8, launched in 1932, certainly qualified as the first mass-produced V-8 sold to the public. Because of Henry Ford's stubbornness, the first versions were less than ideal. The technology was in its infancy, and cost-cutting measures limited the output and reliability of the early models. Over time, however, the “Flattie” became the go-to powerplant for a whole generation of new hobbyists who were called “hot rodders.” The engine maintained its position in the hobby well into the 1950s, even when more modern overhead-valve designs started coming out of Detroit. It's hard to overstate the impact that this simple little engine had on a whole generation of enthusiasts. Even today, people choose a flathead for period-correct builds over far more powerful options. The style and sound of a modified flathead is an iconic part of American history.

Also covered is a unique performance build completed at the H&H shop for legendary race car team manager and all-around enthusiast Ray Evernham. It all adds up to a must-have book with more than 500 color photos and insider tips on building what could be called the most iconic engine ever built: the Ford flathead V-8.

After setting speed records on the salt flats and working for the legendary So-Cal Speed Shop and the NHRA Museum, Thacker wrapped up his professional career by opening an education museum in the Portland, Oregon, area called the World of Speed. However, he is far from being retired, as he continues to work as a consultant and on book projects, which were his first love.

Mike Herman works at the family business of H&H Flatheads in La Cresenta, California. He has rebuilt countless flatheads of many different specifications. He has a deep and abiding affinity for this storied power plant. He intimately knows the design, parts, and best products for the flathead. In addition, he has assisted Rod & Custom and Street Rodder magazines with several articles.