The Big-Block is Back! Introduced in 1965 as the ultimate performance engine option in the Corvette and later Chevy muscle cars—including the original COPO Camaro models—the incomparable Big-Block has thrived for nearly 60 years. Long after the muscle car era, the Big-Block continued to power heavy-duty trucks well into the 21st century, adapting with modern technologies to deliver greater power and efficiency, but always with the signature torque that made it the go-to option for everything from those heavy-duty trucks, to motor homes, marine applications and even military vehicles.