For those following this thread here are two pictures of the car undersides. In each picture the 80’ car is at the top and the 70’ car is at the bottom. In order to change the trucks the one piece roof and window plastic must first be removed. On the 70’ cars it is held in place by 6 plastic tabs. Carefully prying up in the roof will free the piece for removal.
On the 80 ‘ cars in addition to the 6 tabs there is a screw at each end that holds on the roof assembly. The second picture has the trucks rotated to expose the black screw head. The Kadee mounting pads are are also visible in that picture. The position of the couplers against the body underside is visible, these have the coupler mounting arms shortened by 1/4” for closer coupling.
The center wheels on the 80’ car are scale, all the others are high rail.
