You know what? I have photos of the MTH cars - herewith:
Well, the top photo has a brass import (USH) on the left. The lower photo shows an unmodified MTH on the left, and a car with proper frame extensions and ancient sand cast trucks on the right. Both are handsome models, and if you like plastic cars these have to be among the best. In fact, MTH has done definitive work in both freight cars and wood side passenger cars, all in plastic, which is probably the best medium for faithfully reproducing detail. Me? I am sticking with sand cast bronze. Or built-up brass.