One of the rarest big-block V8 engines from Ford is the Calliope V8, which has a capacity of 427 cu-in. The experimental engine was designed for Ford's ambitions to win at Le Mans with the GT40.

While Ford’s famous 1-2-3 finish at the 1966 24 Hours of Le Mans was with big-block powered GT40 Mark IIs, the car was originally designed for Fords smaller V-8 engine. In fact, the original ...