Jim - Just looked at a photo I took of those trucks - very different, a potentially a bit tricky to model. Unlike the Buckeye, there are no cross frames at the springs. The two side frame castings are hinged in the middle, and the cross beams at the springs, only look to extend just past the wheels to a very heavy cast inner frame. Presumably the inner frame has a crossbeam bolster assembly. This explains why they cause the car to sit so low compared to the truck too.
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