Chevrolet just unveiled the C8 Corvette ZR1, the most powerful Corvette ever produced. With 1,064 horsepower produced by a 5.5L twin-turbo DOHC flat-plane crank LT7 engine, it is the most powerful engine ever built by a major United States automaker, and it’s built right here in the U.S. Thoughtful planning produced the best performance from forced induction, married with the legendary 5.5L flat-plane engine architecture. However, before the LT7 was built, the engineering team had a different engine at the back of the C8 Corvette. C8 Corvette ZR1 Test Mule Engine: DetailsDuring a recent interv…