Visitor Comments about this Photo:

This is an S-1, not an S-2. The difference between the Alco switchers is as follows: S-1: Naturally aspirated 660hp Blount trucks, S-2: Turbo-charged 1000hp Blount trucks, S-3: Naturally aspirated, 660hp, AAR trucks, S-4: Turbo-charged, 1000hp, AAR trucks.

Posted by Steven Hall on 2016-08-10 10:14:08

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