I purchased a set of Lionel 2-rail wheelsets with the intention of using them to convert my own Lionel 86' boxcar. wasn't able to use them due to the wheels only being insulated in the center of the axle. not at the wheels. they would short when mounted on the all-metal Lionel trucks. instead I purchased a set of Atlas O roller bearing trucks. the only problem I encountered was the bearing caps hitting the bottom edge of the car on curves. Will need to space it about 1-2 mm to get it just right.