Atlas Model Railroad Co. HO scale 50-foot Berwick boxcar

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Atlas Model Railroad Co. HO scale 50-foot Berwick boxcar

How easy is it to install Kadee metal couplers in place of the Accumates mounted on this model?

Please if you could, indicate the era of the car, in other words current appearance or from the 60’s etc. It would really help some of us that don’t have access to the wealth of information you guys have…ie Kalmbach Library etc…Thanks!