David: Don't know if anyone ever got back to you on this or not, but both these GP-60s are listed as ex-SSW; #1974 has serial number 896003-8 and #1981 has serial number 896003-15,
I've seen mostley BNSF GP60M's and GP60B's. As always lost of mionster 6 AXLE UP Power traveling back and forth in Central New York Some days you'll see more UP than CSX makes you wonder who rilly owns the tracks on occation