Radiator ID help needed

Thanks, Dana67Dart, it's been nearly 30 years with my 340 and since I got this radiator and did this set up. Memory fails, but it appears I must have had the brackets reversed and the lower outlet moved when I set this up!!! Looking closely I see that it has been altered, and I know my 340 has always had the earlier water pump.

Thanks for helping me clear this up. And I guess I can quit looking for a production aluminum on to fit. I do still have a local radiator shop, so I can have this one refreshed or have a custom aluminum one made.