| Six ex-Rock Island GP40s (EMD 9/1966) were rebuilt by Morrison Knudsen 1987-90 with Dash 2 electricals, HEP and F45-type cowls built at Boise. Numbered 4184-4189, they were rebuilt again in 2006/07 at Motive Power Industries and renumbered 4900-4905. I have not found any info on the MPI upgrades. |