In celebration of the Fourth of July weekend, we're sharing our favorite American engine rebuilds! Here's one of our earliest builds, the Ford Flathead V8. Presented by RockAuto.com | Hagerty

This V8 engine was built for speed but ended up saving lives. The Ford Flathead V8, launched in 1932, was America's first mass-produced V8 and it changed everything. It made high horsepower affordable, ignited hot rod culture, and gave the average driver access to real performance. But during World War II, it powered ambulances, military trucks, and even tanks. Mechanics loved it because it was easy to repair, even in battle. And after the war, returning soldiers turned them into drag racers. Th