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SD-90's What is Happening?
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Your observation on the beveled hood is correct but the 90MAC-H's can have both the old style cab, like the 70M, or the new style cab. The GE unit can be both 4400 and 6000 Hp with the overhanging radiators. They too thought of the need to have a convertable unit because of the developing of the 6000 hp unit. The sure way to tell the difference is the 6000 has two exhaust stacks. At one time I would have told you that the stacks were side by side but I have seen photo's of some CSX units that have them corner to corner. Maybe a fix? Any way, I think only the UP ordered the convertable C6044AC and use them in coal service mainly.
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