Can all Chevy 4.3 vortec engines the same?

Not all Chevy 4.3 Vortec engines are the same; they vary based on factors such as model year, vehicle application, and specific configurations. While they share a common architecture, differences in components like fuel injection systems, throttle bodies, and emissions systems can exist. Additionally, some versions may have different power outputs or features tailored for specific vehicles, so it's important to consider the specific application when comparing them.