These locos were built in two batches by General Motors at La Grange, Illinios.
The 141s were built in 1962, works numbers 27467 to 27503 and were originally fitted with GM 8-567CR 950hp engines. The 181s follwed in 1966 (works numbers 31248 to 31259) and were fitted with GM 8-645E 1100hp engines.
Some of the 141s were later fitted with 8-B645E 1100hp engines from the original 201 (C) class.
© JandJ Cottrell's Rail Photos