440 and 833OD
My takeaways from owning a D150 original /6 833OD with a 440 transplant-
trucks got a better OD ratio that cars
you spend a LOT of time in second
the "power shift" is 2 to 3, which is kind of awkward
it's easy to render 1st gear unusable if you put too steep of a rear gear in
many "HP" cars came with 3 speed manual transmissions, 833 OD just adds an OD 4th