Are all push rods for the fuel pump the same from a 350 to a 396?

No, push rods for fuel pumps are not universally the same between a 350 and a 396 engine. Although both engines are part of the small-block and big-block Chevy families, respectively, they can have different specifications, lengths, and designs based on the engine's configuration and application. It’s essential to verify the specific part numbers and compatibility for your particular engine model. Always consult the manufacturer’s guidelines or a trusted parts supplier for accurate information.