It is possible to install DCC Decoder in said Locomotive.... As was mentioned you should perform testing. You also must isolate the motor and supply power to it through decoder only! However, to avoid any confusion and future problems I recommend using Bachmann decoders! After all that is what they install in there DCC Equipped models!

War Baby GS6s received there names as said... They were also painted Flat Black to camouflage from air...!