For A Bodies User Name

I bought my Duster from David Freiburger of Hot Rod Magazine. It was one of his X project cars. I think he was contemplating doing a Baja race with it. He was thinning his herd two years ago and gave me a good price. So.....

DFX 340 Duster = David Freiburger's X 340 Duster

which may fool a few old racers who remember the old NHRA F/X classification for Factory Experimental.