ID help on 833

it is a 4-speed - 3 speed with an overdrive. it is the same basic box as a 4 speed the 3-4 lever is flipped up so that it actually shifts into 4th before going into 3rd which is geared for OD. The trans pictured is a duel-pattern tail housing shifter. It is not designed for an A-body, but for a B/E-body. output shaft and Tail housing length and shifter mount location are different. if you want to go that route it will require some fabrication.
I have not used a B/E-body in an a-conversion before, but will say that an a-body OD trans is not uncommon and are affordable in comparison to a non-od 4-speed.
Someone will chime in here... To give you the low down. bump for you.