The Pennsy FP7s were ordered in both A-B-A and A-A configurations. All the units were delivered by EMD painted in Dark Green Locomotive paint and single buff stripes and lettering in April, 1952. In June, 1953, two three-unit sets were painted in the Tuscan red passenger scheme with five imitation gold stripes and lettering. The engines were ordered repainted in Dark Green Locomotive paint in mid 1958. Photos indicate that three units were green by mid 1960, the remainder by mid 1961.

Athearn Genesis F units are now available in "Modernized" configurations where prototypically appropriate:
• New factory-installed Tsunami onboard sound and DCC decoder!
• Individual sound boards installed in both the A-unit and B-Unit.
• Sound units are Dual-mode, compatible with both DCC and DC operations.
• In DCC mode, all functions are NMRA compatible.
• In DCC mode, you can program an MU lashup with lead unit only horn, bell and lights.
• Fully functional headlights and Mars lights (where applicable) in both modes.
• Operating back-up light (where applicable).
• Genesis driveline with dynamically-balanced five-pole skew-wound motor and flywheels.
• Directional constant lighting.