When General Motors founded Pontiac in 1926, it probably didn’t expect the new brand to struggle. But that’s what it did, barely surviving its first few years due to the Great Depression and an inability to compete with other brands at the time. However, Pontiac eventually found its stride in the 1960s with cars like the Tempest LeMans, largely due to the famed GTO package introduced in 1964. The 1964 Pontiac Tempest LeMans GTO is said to have started the muscle car era, at leas...