I'm really poor at differentiating among types of freight car trucks. Maybe someone can help me to identify the trucks on the Lindenwood wrecker, #99029. It's pictured on Mike Condren's non-locomotive webpage. The link is: http://condrenrails.com/Frisco Catalog/Derricks.htm Thanks, Tom G. Edit: I took out the slash.
You have to remove the last slash after the ".htm" to get the link to work. I wish I could be of help on the type of trucks. They are very interesting.