http://www.railpictures.net/
Either way the differences bewteen the 50&60 are minor.
The athearn models are a good start.What road were you planning on doing?
Here's a link showing the difference.
http://crcyc.railfan.net/locos/emd/sd50/sd50ho.html
"No soup for you!" - Yev Kassem (from Seinfeld)
What are the physical differences between SD50 and SD60 locomotives. I have 2 Athearn CSX SD60's which I would like to renumber as SD50's if I can get away from major rebuilding or remodeling.