Those casting numbers are pretty much useless in trying to identify an 833.
Is the shift mount pad in front of or behind the trans mount pad ? One shift mount pads or 2 ? Behind and one is A body , 2 is B/E , in front of and 1 is 69 down B body.
To figure out the year look on the pass side of the trans , there is a machined pad if it's 68 and newer that will tell you when it was built and what year car it was installed in.
