Ambroid HO Gauge Boston & Maine Prototype Snow Plow Kit Unbuilt in Box

This is an old Ambroid Boston & Maine Snow Plow Kit that was evidently a prototype. Kit seems to be complete and even has a set of Varney trucks that I don't believe were originally part of the kit. They do have some oxidation or something on tyhem that will likely clean off with 3 in 1 oil. No decals but ther is no mention of any in the instructions either. Box is a bit dirty but not real bad.