5 Full-Size Sleepers from the 1960s Capable of Muscle Car-Rivating Quarter-Mile Runs.

1. 1961 Chevrolet Impala SS 409: This famous Impala is recognized for helping to kick off the muscle car era.

2. 1962 Ford Galaxie 500XL 406: Known as the "Thunderbird XL,"

this Galaxie featured a monster 406 cubic inch V8 hidden beneath a hood meant for the smaller Thunderbird engine.

3. 1962 Pontiac Grand Prix 421 Super Duty: The Grand Prix was a wolf in sheep's clothes, seeming luxury yet packing a powerful punch.

4. 1966 Buick Wildcat GS Coupe: General Motors was not going to fall behind in the full-size muscle car market.

5. 1964 Mercury Marauder 427: Mercury's answer to the Galaxie 500X

a groundbreaking design feature at the time, is undeniable.