4sp Trans Hump

In addition to the floor hump for the shifter, the factory parts that are different between a 3 speed/column and 4 speed/floor are: Transmission, shifter, bell housing, and steering column collar/tube/linkage parts. You should be able to reuse everything else. Now if your 833 is out of a '68 and newer A-body, you'll have to get a 29 spline yoke also. If the 833 is out of some other body style, you have to shorten the driveshaft, modify the tranny mount crossmember, and some serious shifter mount mods.
Thanks, Mark