Top 20 Muscle Cars of All Time

6. 1964 Pontiac GTO

Originally the GTO was an options package for the Pontiac Tempest, available with either the two-door coupe, hardtop, and convertible body styles. The engine was a 389 cubic inch V8 rated at 325 horsepower. The engine featured a single Carter four-barrel carb, chromed valve covers, and seven blade clutch fan. The transmission was a floor-shifted three speed manual with a Hurst shifter. The GTO faced controversy when Car and Driver made claims that the GTO they received to review had been upgraded with the “Bobcat” kit for the quarter mile test. Pontiac denied the claim, saying their GTO’s had the 6.9 liter that was optional in full-sized GTOs. Nearly three decades later, Jim Wagner admitted to switching out the engines.