I did it in the 1970s with Athearn trucks and wheels, which are still same profile flanges today. I did have to do what Hotwater did and put st yrenen shims on top of the guard rails to raise the top to height of the running rails. I just painted them black and they disappeared. My track was all gargraves at the time and 072, 36 inch radius curves.
I did not have any scale length passenger cars so I can't say on the. The problem might be coupler swing with body mount depending on what they are couple to. A possible solution is to filled the gaps in the shank and drill a hole for a screw. then mount them like radial couplers on street cars so they can swing farther. They won't self center. If you want to go a bit farther, there is a small tab on the rear of the Kadee shank that is for connecting a spring. You add another screw behind the shank and bend the box centering spring so it has a loop parallel to the car floor. You connect that to the second screw and hook the other end of the spring to the small hole in the back of the shank, and you have self centering. Both CLW and Kadee couplers were designed with this in mind.
