Tobin
5.7 IDI Powaa!
3.73s.
4.10s would be a nice upgrade, I am also converting my truck to a dually. We are planning to go to some of the ODSS races this year since we dont have the NHRDA anymore.
Does it complain a lot taking off and backing up? Yea, 4.10s or 4.30s would seems to be a good fit.