I am working on updating and modifying an ABBA set of Proto FA-1 and FB-1 locos I snagged off e-bay some time ago. I am already working on the EMD swap details for the FA-1s, and I am expecting the FB-1s to have standard Alco details. I did not see anything in the archive about it and the diesel shop does not note that the FB-1 numbers I have were EMD swapped. I will be doing both FA-1s up with spark arrestors, as it seems most EMD prime movers got them eventually. But in the Archive, I have noticed the FA-1s switch between one headlight and two headlights, presumably with a mars in the lower light. What is up with that? Both numbers I have, FA-1 SLSF 5200 and FA-1 SLSF 5215, only appear in the Archive with single headlights, and are not on RRPictureArchive. Did some units get second headlights during their EMD conversions, or was it all of them?
