67 833 id

Some of the manual ID methods:
Front yoke diameter,the mounting flange that goes into the bell housing,where the 4 bolts are.
Tail shaft shifter mounting,and location
Input shaft spline count
ID stamping pad on right side of tranny 68> have ID codes
casting number from the case, tail shaft,shifter cover,
casting date on case
Material for case and tail shaft
gear ratio if it comes down to that
pictures to make sure it,s a 4 speed and not a 3 speed

http://www.slantsix.org/articles/4-speeds/ODA833fourspeed1.htm
mrmopartech