Tim,

Yes it does but the AT&SF seemed to be full of
these oddball ideas. If you take a three bay
GA-122, remove the hoppers and replace with
lengthwise doors and build up or borrow flat car
ends, that model on e-bay is what you are going
to end up with.

Somewhere I have photos of their attempt to reduce
the wind resistance of modern coal hoppers by
putting bonnets over the open end areas. The test
process even included a locomotive with a boom
sticking out about 30' forwards to put wind
measurement instruments.

The purpose built 1963 B-L-H cars are odd enough
in themselves. I don't know what their center of
gravity was but it must have been rather high.

Russ Strodtz