And every Z28 engine cubic inch designation since 1970 was a corporate level engine that also was used in the Corvette too. This included even the 305. 305 was the base Z28 engine in the early 1980's and also used previously in the Corvette as well.
The LS-7 in 14.. I love it and the car! The Z28 changed with the times through the years and even when they were poor performers in the early 80's - odds were that everything else was the same or worse. Gee with '14 we have a factory Z06/LS-7 engine now coming to a Camaro-- and BOY I want one.