What's an 833 o/d from a truck worth?

The van version was a short shaft like the A bodies. I have had a bunch of these and they are worth whatever you can get someone to pay. usually in the $100 range.

That's incorrect.
Van's and pick up trucks are both long tailshaft transmissions.
The passenger car "F" body's are short tailshaft.

My aluminum case, OD trans, in the picture, is out of a van.