18: 1964 Oldsmobile 442
Unlike the GTO released at the same period as this car, the 442 had some interesting features to it. To differentiate the two, GM decided to put a special engine inside the Oldsmobile. The 4-4-2 engine was a performance powerhouse that not only added power but also refinement.
This was higher than your average muscle car but in fact, the 442 still offered a lot of luxury features. The Oldsmobile 442 is iconic for the stylistic features of the car and the 330 V8 producing 310 HP. From a power and style standpoint, 1964 Oldsmobile 442 is among the most iconic GM muscle cars to hit the market.