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On a recent trip I took a picture of NS#6733 on the lead of a Triplecrown train. When I looked up the train in a roster it was listed as a Ex-Conrail SD60I. I was wondering what the "I" designated on it, And what the diferance between it and a SD60 or SD60M are. The SD60I was a widenose unit. I'm so used to seing C44-9W's out here that it didn't totally register that it was even an EMD until I looked down and saw the radiator fans on the long hood(I was on an overpass). Any help would be appreciated.
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