I have had both in an e-body. If the choice is between tko and 833 I pick 833. Drive-ability goes to the tko more gears and OD.
Too me the 833 is more fun to drive.
If it were me I would get a tkx or t56 magnum since you don't seem to mind cutting a little. A tko is not worth $6k and cutting a car a t56 is.