OD or Non OD 833 behind a slant 6?

I’m not really looking to change the rear gearing. This is not a performance car. Just a 4 door survivor that I’m getting back on the street to putter around in. I have my BB Duster for having fun. My main concern was that the 2.66 gearset with 2.76 gears would be so sluggish at times that I would have to be cautious of when I shifted. If it was a decent small block or something I would consider the lower gear sets.
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