For those that don't want to cut windows into the back of a Rock Island, Golden State, Golden Divian, K4632-0479, 18" passenger car. You're welcome to just paint that Golden State car Armour Yellow & Harbor Mist Gray with a red stripe and it will still be historically correct.
During my research I found out Union Pacific's City of San Francisco ran that exact 10/6 sleeper car (SP car number 9040) on the end of there 1954 train.
Thanks,