While looking at photos of Conrail RS3 engines, I came across this one;
The “shortened hood” is an interesting feature.
Was this a factory option or a common modification?
The program of modifications was started by Penn Central in 1972 at the former NYC DeWitt shops and the former PRR Altoona shops. Conrail continued to do RS3 rebuilds until 1978. There are a lot of variations on the RS3m models from lowered hoods of varying heights to boxy enclosures where an EMD prime mover was used to replace the original Alco one.