Suitable Models - The Feb 2005 issue of RMC describes modifying an Intermountain 4650 cu ft car to build a 4460 cu ft car. However, ACY Modeler Vol. I No. 1, Spring 2014, points out issues with this approach and suggests alternatives.
https://www.acyhs.org/newsletter/ACYModelerSpring2014.pdf

Car History - The ACY Modeler mentioned above covers this as well.

Properly stored, these decals should remain usable for many years.

Acknowledgments - Special thanks go to Susan and the late Wade Griffis, of Jenison , MI, ACY Historical Society, and Ron Roberts of Rail Graphics, without whom this project would never have happened.