here's a top pad on a MARINE engine assembled at the Marysville plant VS. the AUTOMOTIVE assemblies from the Trenton plant above

anyone know what plant assembled industrial engines? or have a top pad pic of an industrial RB engine?

the right-hand rotation block from this pair is running around Las Vegas in a '69 Dart - I'll see if I can chase it down & get a pic

moparts M 440 decode MARINE D440.jpg