Is there a website or a list of what an N scale freight car used for an actual prototype? Something similar to the N scale passenger prototype website by Fred ¤¤¤¤¤ (http://www.trainweb.org/fredatsf/protopass1.htm). I know that some cars are obvious (or seem to be obvious)...MT's steel 40' box car is a model of the 40' PS-1 box car made by Pullman Standard beginning in 1947 and continuing well into the 1950's. At the same time, Atlas makes a PS-1 too...only with a completely different door choosing to model the PS door that was introduced in 1956 (or is it a Superior 6 panel door?). Anyways, is there a list anywhere of what cars are what? Thanks for any help.