Eliot, IC had to have used their E6's on the City of New Orleans at some time. However, I am not aware of their being regularly assigned to that train. They only had 5 E6A units, and one of those did not last long. It was wrecked in the 1940's and sent to EMD for repair, returning as an E7.
After the IC had purchased its fleet of E8's and E9's (by the mid-1950's) The E6's and E7's were more commonly seen on the Iowa trains, the Green Diamond, and the Shreveport trains. However, the IC E6's were well-maintained right to their last day, and made occasional appearances on the New Orleans trains.
