A-833 OD transmission what type is mine? 421,422??

Where are you getting your linkage from? not sure about 421 or 422 type. You have what looks to me as a nice O/D trans small output, small front bearing retainer that should work with your 65 bellhousing. The O/D linkage from Brewers should work with the 6350 mounting pad, and a MOPAR Hurst shifter. What shifter and linkage do you have?

Type 421, A Body. And it should be O/D linkage. That means the 3/4 arm points down.