Those 2 slant 6 cast iron bellhousing part numbers have different pick up points for the ball stud.
See in the picture below.. 3 of them are one part number and one is a different part number.
I have one of these installed in a '69 dart swinger.. The cast iron 833 slant bell housings were never designed for that chassis, but by redesigning the bell housing ball stud, welding additional material onto it and drilling new holes to properly locate it within the chassis it works fine.
If you are a bit skilled with a welder and a drill you can futz with what you currenly have to make it perpindicular, and parallel in all planes. I usually get the ball stud bits from the swap meet or parts bin and just make my own by moving and roatating it unil the torque shaft lines up properly.
It will also work with a bit of misalignment as well, as the ball on the frame and bell housing were designed with movement of the engine and chassis in mind.
If that is a stock torque shaft and you have heavier springs in the pressure plate it will likley break on you some day from shear forces at the frame side ball stud.
I have had this same failure happen on stock shafts on the '64, the '62, and on a '79 F body.
Good luck and happy slanting.