I have a number of the subject cars to change from the kit coupler to Kadee.
I note the Kadee conversion chart offers several different MSC type options, including the venerable #5.
I tried a #5 - it works but about 1/32" of the copper colored ‘tension plate’ that is part of the Kadee system pokes forward of the coupler box. Slightly unsightly.
Has anyone tried the various Kadee options for these cars & found one that is a tidier fit?