It is my intent to build a computer inside of an 'O' or 'S' scale freight car. There is more about the project here: http://www.trainboard.com/highball/index.php?threads/building-a-computer-inside-of-a-boxcar.83547/ I am interested in the interior dimensions of: 40' and 50', maybe even larger boxcars and cattle cars High Cube boxcars? Are there any? Other suggestions for the project? Sources? Please suggest or PM any possible sources for one of these cars. Thanks!