Ralph,
It is a E40 (New Haven EP-5). Penn Central rostered eight former New Haven EP-5 passenger locomotives. Known by crews as "Jets," these locomotives were built in 1955 for the NH, wore the "McGinnis" paint scheme, and were numbered in the 370-series. After the PC merger the eight surviving units were reclassed as E40s, numbered 4970-4977, and were painted PC black. They were originally slated for passenger service, but they proved to be unreliable, so they were put into freight service. Six E40s survived to Conrail, but were retired by the end of 1977.