8. Buick Gran Sport 455
The Buick GS 455 is special and interesting in muscle car mythology. As with all other GM muscle cars, they limited the Buick Gran Sport to 400 cid. But, in 1970 when GM lifted its ban on engine displacement, Buick introduced a strong model they named the Gran Sport 455. This car featured the famous 455 V8 rated at 360 HP.
And it could launch this big, heavy car to 60 MPH in just around 5.5 seconds. This was lightning fast in 1970 and its speed is still respectable today. In fact, the power output wasn’t that far from the 1969 GS 400. But the torque figure was significantly higher, so the mighty 455 engine delivered over 500 lb-ft of torque. Those numbers made it one of the strongest muscle engines of all times.
And it was this characteristic was what launched Buick into the front row of the most powerful models of the period. However, since it was a Buick, they equipped the GS 455 with updated standard equipment. Also, it had a long list of optional extras. So, in a modern-day package, this super luxurious modern muscle car offered a pleasant, yet blisteringly fast ride.
But for those who found the 360 HP and 510 lb-ft of torque wasn’t enough, Buick offered the extremely rare, expensive Stage 1 and Stage 2 kits. They included different intake systems, high compression heads, beefed-up engine internals and sports exhaust. However, those cars are extremely rare since most customers were unaware of the existence of such options. So, most Stage 1 and 2 buyers were professional drag racers.