Bill D

Hi all! My name is Bill, and I live in Tucson, Az. I am part owner in a ghost town in southern Az. (Ruby). A former caretaker abandoned a Subaru there, and we are trying to identify it. I got the following info. from the tag inside the drivers door jam: MFD 03/81 JF1AM43B2 BB445222 Can anyone tell me the model type? The engine is stamped "EA71". What size is this engine? There is also a spare engine "EA81". I suppose the same type, maybe a later year? I have pix upon requst. Any help is greatly appreciated. Thanks!