Drive shaft?

Whats everyone using for a drive shaft? I just put in a 440 and 727 in my duster and called up a shop that I have used before and told me $300 for shortening, balancing, yoke and U-joints. Now I dont have a drive shaft but figured I would get one out of a 70's truck or van with a BB and bring it to them. I also see inland empire, and dennys and hear good things and they are almost $400. Whats everyone doing for this kind of swap? The car is going to be Street/strip only about 500hp.