The 1975 Pontiac LeMans is like the automotive equivalent of bell-bottoms—iconic and a little bit groovy. Thanks to the Pontiac Maximum Mileage System, it’s also a tree-hugger with a heart, sporting a catalytic converter for cleaner emissions. Under the hood, you can opt for a humble 250 cu in inline six or go full disco with a 350 V8. Feeling wild? There’s the 400 cu in engine, because who doesn’t want their car to be as powerful as their hair was big in the ’70s? Special shoutout to Gateway Classic Cars for the retro visuals!