Kind of crazy, 273's aren't supposed to be torquey but I can accelerate through the gears normally and skip 2nd. and go from 1st. to 3rd. or skip 3rd. and go from 2nd. to 4th. without issues. The 833 od. is basically a 3 speed with 4th. as a o/d. I wouldn't see much difference. 1966 833's do have a lower 1st. gear ratio. Maybe that helps.