Does anyone know when Santa Fe stopped using F7s for passenger trains and when they stopped using them for freight even if it was just branch lines. When were they rebuilt into CF7s?
I think the F7s were used in passenger service up until Amtrak, and Amtrak leased some of them in its early days. The F-units were rebuilt to CF7s from 1970 to 1978. I think the end of the rebuild program was about the end of the unrebuilt Fs in freight service as well.
For more info, here's a website with a detailed ATSF roster, and here's a good page about CF7s.