4-speed gear set (3.09 first)

BTW, I'm currently running the 833 O/D in a truck that was a factory six but now has a 440.
I can only assume the final drive is a 2.73 (9 1/4 without a tag), since it's a 1980 six truck probably built for mileage.

With that combo, shifting out of first comes pretty darn quick.
That's why I was thinking 2.94 or 3.23 would be the max with that 3.09 first.