Dave: The Conrail E units are: 4020 ex-Amtrak 315, ex-PC 4309, nee-PRR 5809A; 4021 ex-Amtrak 499, ex-Amtrak 317, ex-PC 4311, PRR 5711A; 4021 ex-EL 833, nee-Erie 833.
If you think they are difficult to shoot with color, you should try shotting them on a dark day with black & white. Jack Armstrong --> SPORRS: Serious Photographers of Railroad Related Subjects
