My first attempt to "improve" a car is Bachmann's 56' center flow hopper. Searching the web for info gave me zip. Anybody know where I can see a picture or pictures of this thing? Thanks.
There is a list of websites with photographs of freight cars at http://cs.trains.com/trccs/forums/t/138458.aspx.
"No soup for you!" - Yev Kassem (from Seinfeld)
What do you mean by "Improve"? Make the car more reliable in operation, better appearance?
Weight and correct coupler height along with free rolling trucks will make a car perform better. A light coat of Testors Dullcote airbrushed on the car can take the plastic shine away.