I do not have an OD, I run an A833 with a 3.09:1 first gear and 1:1 4th. This allows the use of a 3.23 gear without losing a bunch of 1st gear multiplication. 3.55's are also fun with this setup.
A Gear Vendors, or Passon Hemi OD look appealing to me as I don't want to cut up a factory 340 car.