7 best American muscle cars of all time
1969 Chevrolet Camaro ZL1
Today's 2013 Chevrolet Camaro ZL1 is named for the legendary 1969 Camaro ZL1, and for good reason. With fewer than 70 ever built, the '69 ZL1 not only had the most powerful Chevrolet engine offered to the public for decades, but it's the rarest production car Chevrolet ever made, bumping the price to $7,200, according to HowStuffWorks.com.
Based on Chevrolet's iconic 427 V-8 engine, the ZL power plant had an aluminum block in place of the regular 427's iron one -- the first such Chevy production engine. Although it was officially rated at the regular 427's 430 horsepower, most independent testers pegged the output as being much higher.