help transmission

Question, is this column or floor shift?
78 Cordoba, transmission is most likely a lock up

From a linkage perspective you could swap in a 66 steering column and get all the linkage that goes with it, OR use an aftermarket floor shiftier and linkage, you would still need kick down linkage in eather case.

The difference in crank shaft register diameter and converter hub diameter has already been mentioned, there is no easy way around that.........possibilities range from: pull engine, pull crank out, have register bored to fit converter; have custom converter made with smaller hub; MAYBE have hub on your converter turned down to fit; swap in a post 67 small block with larger register crankshaft

Good luck!!