The LS7 big-block was never installed in factory cars, but it was offered as a crate motor from 1970 till late 1980s, it made over 520 hp and around 600 lb-ft ...
Pontiac built plenty of rare muscle cars back in the day, but this '60s icon is by far the rarest.
The 1967 Impala SS big-block lineup has shifted from used-car bargain to blue-chip collectible, with a clear hierarchy ...