8. 1970 Buick Grand Sport 455 Convertible
The Buick GS 455 is a special and interesting car in muscle car mythology. As most people know, Buick was a luxury car brand and as such wasn`t interested in the muscle car hype of the mid-’60s. However, despite its restrained image and older clientele, Buick produced a couple of memorable machines with high horsepower ratings and unmistakable style. Cars like the Riviera GS, Wildcat, and Skylark GS were true muscle cars that offered uncompromised performance, as well as a high level of luxury and quality. But in 1970 when GM lifted its ban on engine displacement, Buick decided to introduce one strong model they named the Grand Sport 455. This car featured the famous 455 V8 rated at 360 HP, which could launch the big, heavy car to 60 mph in just around 6.5 seconds.
This was lightning fast in 1970 and its speed is still respectable today. Since it was a Buick, they equipped the GS 455 with updated standard equipment and it had a long list of optional extras. Every GS 455 came with heavy-duty suspension, beefed-up steering and brakes, and much more. The price was close to $4,000, which was a hefty sum for the day, but the GS 455 coupe proved popular with over 8,000 built. However, they offered GS 455 as a convertible as well, and just over 1,000 were built. In comparison to some other models on our list, 1,000 cars may seem like a fairly big number. However, those GS 455 convertibles are rare due to the fact that the market forgot about them, making them treasured finds.