As
Dave posted, all but the green flatcar are Athearn blue box models.
I'll start with the ATSF 11074 boxcar. It is very close to being accurate from 1954. It was built by ATSF and is a general purpose boxcar (XL) with interior retaining devices, hooks, rings or "E-tracks". It was normally used to haul any non-perishable loads.
The ATSF 90806 flatcar is representational of a series built in 1967, but I cannot readily identify the builder. As with the boxcar, flatcars could haul anything. In the era that it would be active, that might be machinery, pipe loads, concrete or steel beams, etc.
The D&TS boxcar appears to be one of those "imagined" models that Athearn sold. Double door boxcars were mainly used for wide loads like automobile frames or lumber, but could be used for many other things as well.
The LV 8247 is a plug door boxcar used where sealing off the elements was important. Cargoes might include cardboard either in bulk or as a protection for the cargo. It appears to be a pretty good representation of one of their cars from the 60's. It may have been built earlier than the "new" date stenciled on this model. I believe that ACF (American Car & Foundry) was the manufacturer. Plug doors are not just used on reefers. The car type shown on this model is "XML" is indicative of a generic boxcar with load restraints. Reefers are normally "RB" or "RBL" for non-mechanical types.
MILW 65640 is probably a prototype model but I have no further information. Cars in that number range were all flatcars. It is a standard generic flatcar as indicated by the car type "FM" stenciled near the right.
I have been to a website that shows the spotting features of various manufacturers, but I am unable to locate it right now. Further information regarding "AAR Mechanical Designations can be obtained
here.
A couple of general comments here. Interior detailing is OK if you open the doors when spotted at an industry, but railroads didn't move a car with open doors when loaded. While detailing the underside of a car is a great idea, I don't do it because other than some hanging brake equipment, it is not seen on my flat layout. I do however turn the floors upside down on many Athearn models to get the boards exposed on the bottom and the weight inside the car, but if you're modeling loads this is a moot point. You might try it on the sealed door boxcar. It takes a little thought, but is relatively easy without any additional parts.
Good luck.
