modify 65 column dual cable shift for later single shift 904

^^ 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.)

I didn't know about that. Is there a way to tell from looking at it or will the converter just not fit? Don't know what year the trans is.