modify 65 column dual cable shift for later single shift 904

Is the transmission a slip yoke type?
I'm working on a 65 Valiant that will get a slip yoke 904. I'm using a 66 Valiant/Dart steering column and linkage.
^^ This is the way to go. When looking for a column, make sure it matches your application: power or manual steering. They are different.
Also be aware of the convertor snout mismatch with the crankshaft recess if you still have the original '65 engine and your new 904 is '68 or newer. (The '65 convertor won't work on the newer 904, either.)