There's been a fair amount of guys talking about wanting to swap their limited slip Dana 80 dually 4. 10 rear ends and open Dana 70 4. 10 front setups. I have a '98 3500 4x4 dually that has had excellent care (currently running Royal Purple). I liked to work out a trade for my limited Dana 80 3. 50 and open Dana 70 fronts. I'd like to make it a complete swap excluding brake systems (unless you have rear disc /I have rear drums). If you live in So Cal I have a larger garage and we can do it right there. Any interest. I tow heavy and the 3. 50s just don't cut it.