this no doubt has been covered on this list prior so forgiveness is asked if you are repeating yourself.
Could you however put a better dating (by decade, by year if possible) on the statement in your last paragraph of : The Accurail car represents cars with late R+3/4 improved Dreadnaught ends; this model, with its 4/4 improved Dreadnaught ends (hopefully with early taper) has more utilty for the steam-to-diesel transition era modeler.
