It’s the natural order for things to progress over time, but often you need to look to the past to build the future. The RSX heads on the new 1,004hp ZZ632 big-block Chevy crate engine are a perfect example of this. To get the lowdown on this high-flowing head we met with the guys who made this new big-inch, big-power, pump-gas crate engine possible, including Ron Sperry, the guy the RSX head is named after.
Sperry is a legend around General Motors. He joined the company in 1968 after graduating from General Motors Institute. During his time with the company, he has mostly
