[rwjenkins]

How about stretching the cab? Looking at the prototype photos, it seems like you'd be closer to scale by adding the slant to the front of the cab, that is extending the roof rather than cutting back the bottom. That would also leave only about 1/4" that you would need to stretch the firebox back to meet the cab front, which can be done pretty easily with strip styrene.

 

[rwjenkins]

Are you going to paint her black or in the Glacier Park scheme? Looks like at least one of these engines was painted green at some point in her career: http://donsdepot.donrossgroup.net/dr0102/gn2176.jpg. Of course it would also look awesome painted black and hauling a string of ore cars. Either way, she's looking good so far!