Yeah, A Dana80 would work for you, if you get a SRW (C&C may work as well- measure your track width). The SRW technically would be a hybrid, but the D80 I have has the same bearings and wheel seals as the 70, so it's hard to say. The differential and tubes are bigger. I have some custom u-bolts I am going to try to install this weekend. (I have modified 1st Gen u-bolt plates and stock ubolts in there now. If you go the route I am going, you will need new shock mounts, as the 1st Gen and 2nd gen are radically different.
Daniel