OD or Non OD 833 behind a slant 6?

I have a daily driver 68 dart with a slant six/833 OD (1976 transmission) and 2.76 gears.

I only have that highway gear because I couldn't afford to change the rear end when I put the OD in. (Was an auto originally)

I have to rev it up to get going, it's very soft on the take off. On the highway it's a dream because it will do 85 with a relatively low rev (I don't have a tach but I can feel it's not stressing at all at 85)

Its not a hot rod setup but for cruising and highway, it does work. If you are going race off the red light, you might lose to a jap crap fairly often.

I plan to change the rear end and get a lower gear eventually but for the past 4.5 years, it's been a decent daily driver.