63. Dart with a hydraulic clutch set up?
I used all of the factory linkage etc on my '62 Valiant Wagon which has less space than the '64 Dart under the hood and seemingly between bellhousing to the the rail as well. You can make the linkages work if you get the exhaust custom-built. I built my exhaust own so It worked out fine. It also still has the 3-speed column linkages. I have no idea what an exhaust shop would charge to build a bespoke section of pieces like that.