Conrail had ordered 28 additional SD80MAC locomotives, but that order was suspended as the NS and CSX takeover of Conrail proceeded. In its place, Conrail ordered 24 EMD SD70 locomoitives built to NS specifications and 15 EMD SD70MAC locomotives built to CSX specifications, as each group would go to the respective road following the Conrail takeover date. Both groups were delivered to and were painted for Conrail.
Of the 24 Conrail SD70's that went to NS (numbers 2557-2580), NS 2574 is the last one remaining in Conrail blue.
Also visit the NSDash9 facebook page