Help identifying A-833 Trans

Yup, that's an A body trans.
I'm not a big numbers guy, so here is how I would go about approximating the year:
Count the splines on the output shaft. If it has 29 splines (edit: I should have said 30 splines~sorry,brain fart), it is most likely '68 and up. If it has 25, it is '66-'67. '65 and earlier used a ball and trunion output shaft, which yours does not have.
Look at the bellhousing- is it cast iron, or aluminum? Cast iron would indicate early '69 and previous, aluminum would be later. If you can tell if it used a 10.5" clutch/130 tooth flywheel, that would also indicate '68 and later- earlier units used a smaller (9-9.5 inch?) clutch and flywheel. Your bellhousing also appears to be a single pattern (4 spd.) unit, also indicating '68/early'69 and previous. Later ones were dual pattern (3 and 4 spd.) in addition to being aluminum.
Hurst shifter (if original) was not used in'67/early '68 (?), when an Inland brand shifter was used.
So, looking at your trans., IF it is a 30 spline output with a single pattern iron bellhousing, I would guesstimate it as a late '68-early '69 A body unit.