Where is the EGR valve on a 1985 305 motor?

A 1985 305 cubic inch Chevrolet small-block engine did not have an Exhaust Gas Recirculation (EGR) valve in the same way later models did. While emission controls were present, the system was simpler and didn't use a dedicated EGR valve like those found on later vehicles. The emission control system likely relied on other methods like catalytic converters and possibly a different type of air injection system. Therefore, you won't find a conventional EGR valve on this engine.