This is a partly assembled HOn3 Jordan Spreader. I have been told it is a Rio Grande Models, Jordan Speader. I have no other parts but knowing it is a RGM model replacement parts and instructions are still available.. I don't have the original instructions for it so if you can contact RGM and get a new copy.
The upper swing arms swing freely, the lower flange arms also swing freely. The work so far is excellent. I have no doubt someone with some ingenuity can figure this unique car out and finish it up making a great looking model.
https://www.riograndemodels.com/store/RGM-3019-Jordan-Spreader-dual-gauge-less-trucks-p362124188
I do combine shipping for more than one purchase.