If you want odd power on the Rock Island, Rio Grande GP7s went to the RI, kept the D&RG paint, but were restenciled with the RI logos while they were being used, #4206, 4205, 4203 which became 4288. Late 1973 or so. See page 40-41 of RIO GRANDE DIESELS A PICTORIAL HISTORY - VOL. 2 by Joseph A...