These questions were asked on my Model Railroads of Southern California group:
“I'm trying to finalize my car fleet for the mid-1950s (1954 to be exact, east coast area) and need to know the following:
When did transport of grain change from boxcars to grain cars? (Before 1954 or after?)
*What kind of cars transported grain when the change over came? (Covered hoppers, sure, but which type?)
Any definitive answers on this group?