@GG1 4877 posted:While SD40-2 phasing variations in many cases are minor (aside from the long short hoods found on ATSF and SP or the high short hood on NW, SOU, & NS), there are a lot of spec changes over the 12+ years this locomotive was in the EMD catalog. I'm in the process of rationalizing all of that now to create a factory friendly project where there are the smallest amount of tooling changes while also being prototypically authentic to each road. Not an easy task as I'm quickly learning.
Don’t forget Conrail’s version with Flexcoil C trucks. The whole reason for the lengthening of the SD40 frame was to accommodate the HT-C trucks, which made the CR variant look a little silly. Maybe not as silly as the 3000 gallon fuel tank models.
If anyone is interested in some of the many variations there is a great page that has details of the WLE SD40-2s, of which they’ve got a nice collection. Some however, are reman’d SD40s like the three ex-PRR units they have.
