Ford’s Y-block V8 got its nickname from its own silhouette, but it carried a hidden oiling flaw that could quietly destroy an engine from the inside, one that Ford’s own racing program solved years before the factory did. Despite the flaw, and a hard displacement ceiling nobody could engineer around, the Y-block gave Ford a real advantage over Chevrolet for three straight years. Read on to find out how the fix worked and where the engine’s limits finally showed up.