Truck Dana
nothing wrong with going dana, especially if you can get it cheap/for free...that will be the last rearend you put in your car (or atleast for a LONG time).
However, i believe that later model truck danas have an ABS port, which needs to be blocked...i believe there is another modification as well that has to be done, but i cant remember off the top of my head...im not sure if these housings and modifications sacrifice strength over an older truck or car housing.