General Motors 650 horsepower 6.2-liter LT4 V8 used in the 2015 Corvette Z06 is built at its Tonawanda Engine Plant in, you guessed it, Tonawanda, New York. The facility is also responsible for assembling its EcoTec3 4.3-liter V6, EcoTec3 5.3- and 6.2-liter V8s, Ecotec 2.0- and 2.5-liter four-cylinders and the…