Does the old MEW (Model Engineering Works) air dump car have any resemblance to the Santa Fe Ga36-38 class air dumps. It seems the size is far apart, around 12 yard to a SF 20 yard car.
That's the problem, Jon; the prototype for the MEW model was structurally the same but too small. At one point, I had thought about trying to splice the parts from two MEW kits together to get a reasonable facsimile, but I never followed through on that plan (and splicing zinc alloy castings isn't a simple matter).