Those were the GREAT days of RR'ing. as far as I'm concerned but the GN junk we were saddled with took some of the "joy" out of it. I can't recall the no. but one of those beasts, a GN F3A, nearly killed me on train 88 at Dugan X'ing. years ago. I witnessed, first hand and up close, a crankcase explosion that totally destroyed the prime mover and, very nearly, yours truly.