I am in the planning stages of designing a railroad based on the IC's line from Chicago to Waterloo and am wondering what would be a good starting point for kit-bashing an IC SD-70. I'm also wondering about building an SD-40A. I have little experience kit-bashing anything, but have quite a bit of experience with modeling 1/35th scale armour. Any ideas would be appreciated. Thanks.
PS, This will be a DCC railroad and I would like to add sound to the units.