Yes. I'm not an 833 expert, but the shifter mount pads are all different between A/B/E bodies. 64-69 B/C body trannys are their own deal. While 70-up B and E bodies share the same transmission with the 2 seperate mount pads cast into the same tailshaft.

I believe the transmission mount point also changed in 1970. Prior to then the B body 4 speed transmission had it's own trans mount cross member but the 70 up units are the same as a 727. A body transmissions have a shifter mount in between the B and E bodies, with it's own shorter tail shaft.