Chevrolet Monte Carlo SS
The first Monte Carlo left the factory in 1970. Built on the modified Chevelle platform, the Monte Carlo was a handsome coupe-only car with V8 engines and decent performance. Even though most Monte Carlos came with smaller V8 engines, there was one crazy muscle option in the form of the SS 454 package (via Hemmings).

This version was a true full-size muscle beast with a monstrous 7.4-liter V8 engine that pumped 360 HP and propelled the heavy Monte Carlo to an amazing 0 to 60 mph. For just $420 above the base price, buyers could get this trim level, transforming this coupe from a somewhat lazy cruiser to a quarter-mile beast. However, only around 3,800 people decided to do so, and the Monte Carlo SS 454 remains one of the rarest luxury muscle cars ever produced. The reason for such a low number is pretty apparent.