That casting number is the same on all cast iron 833 manicases , TOTALLY USELESS in trying to identify the trans .

Is it a 23 spline or 18 spline ?

Does the tailshaft have 1 shifter mounting boss or 2 ?

If 2 it's a B/E body trans.

If 1 is the mount in front of the trans mount or behind it ?

If in front it's a B body trans , behind A body trans .