Okay, if you have an 'old' car(a boxcar) that you feel you can defile,
remove the body from the frame, then use a drill & drill out the rivet.
add a new type coupler using the plastic push type pin that hold them
to the frame. If you don't have a car that you're willing to defile, look
around at junk shops etc for an older car that is missing a truck &
or wheels on one end and convert that to a transition car.