The Iso Grifo AC/3 was a series of competition cars introduced for 1965. The AC/3 was created by famed engineer Giotto Bizzarrini, the man behind the Ferrari 250 GTO, and was his vision for the Iso Grifo. These competition cars were based on the same platform as the Series I & Series II production cars, but were vastly modified and featured drastically different styling. Alongside its alloy body, the AC/3's 5.4L Chevrolet-sourced V8 engine was moved back by almost two inches, improving its center of gravity and handling. Unfortunately, Bizzarrini and Iso differed in how they felt the Grifo should continue, leading the production Grifo and the A3/C being built in separate factories, before the partnership dissolved entirely with only 22 examples of the A3/C produced. Often referred to as the "improved GTO" by Bizzarrini himself, these rare Italian performance machines are amongst the most sought out by collectors.